| Schedule of selected quarterly income statement data | 
        
| 
   
| 
   
 | 
   
 | 
 Quarter Ended 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 Dec. 31, 
2011 
 | 
   
 | 
 March 31, 
2012 
 | 
   
 | 
 June 30, 
2012 
 | 
   
 | 
 Sept. 30, 
2012 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 (In thousands, except per share data) 
 | 
   
 | 
 
| 
 Fiscal Year 2012 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Revenue: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Health Services  
 | 
   
 | 
 $ 
 | 
 158,043 
 | 
   
 | 
 $ 
 | 
 161,170 
 | 
   
 | 
 $ 
 | 
 170,403 
 | 
   
 | 
 $ 
 | 
 181,564 
 | 
   
 | 
 
| 
 Human Services  
 | 
   
 | 
 81,560 
 | 
   
 | 
 82,282 
 | 
   
 | 
 95,950 
 | 
   
 | 
 119,172 
 | 
   
 | 
 
| 
 Total revenue  
 | 
   
 | 
 239,603 
 | 
   
 | 
 243,452 
 | 
   
 | 
 266,353 
 | 
   
 | 
 300,736 
 | 
   
 | 
 
| 
 Gross profit  
 | 
   
 | 
 59,847 
 | 
   
 | 
 64,766 
 | 
   
 | 
 78,701 
 | 
   
 | 
 84,629 
 | 
   
 | 
 
| 
 Selling, general and administrative expenses  
 | 
   
 | 
 32,756 
 | 
   
 | 
 37,959 
 | 
   
 | 
 43,877 
 | 
   
 | 
 42,810 
 | 
   
 | 
 
| 
 Operating income from continuing operations: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Health Services  
 | 
   
 | 
 16,783 
 | 
   
 | 
 18,202 
 | 
   
 | 
 25,652 
 | 
   
 | 
 19,982 
 | 
   
 | 
 
| 
 Human Services  
 | 
   
 | 
 10,308 
 | 
   
 | 
 8,605 
 | 
   
 | 
 9,187 
 | 
   
 | 
 21,822 
 | 
   
 | 
 
| 
 Consolidating adjustments  
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 (15 
 | 
 ) 
 | 
 15 
 | 
   
 | 
 
| 
 Acquisition-related expenses 
 | 
   
 | 
 — 
 | 
   
 | 
 233 
 | 
   
 | 
 1,877 
 | 
   
 | 
 766 
 | 
   
 | 
 
| 
 Legal and settlement expenses (recovery), net  
 | 
   
 | 
 186 
 | 
   
 | 
 (824 
 | 
 ) 
 | 
 (352 
 | 
 ) 
 | 
 1,080 
 | 
   
 | 
 
| 
 Operating income from continuing operations  
 | 
   
 | 
 26,905 
 | 
   
 | 
 27,398 
 | 
   
 | 
 33,299 
 | 
   
 | 
 39,973 
 | 
   
 | 
 
| 
 Discontinued operations, net of income taxes  
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income/(loss) from discontinued operations  
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Loss on disposal  
 | 
   
 | 
 46 
 | 
   
 | 
 62 
 | 
   
 | 
 9 
 | 
   
 | 
 (83 
 | 
 ) 
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 46 
 | 
   
 | 
 62 
 | 
   
 | 
 9 
 | 
   
 | 
 (83 
 | 
 ) 
 | 
 
| 
 Net income  
 | 
   
 | 
 $ 
 | 
 17,704 
 | 
   
 | 
 $ 
 | 
 14,273 
 | 
   
 | 
 $ 
 | 
 20,485 
 | 
   
 | 
 $ 
 | 
 23,671 
 | 
   
 | 
 
| 
 Basic earnings per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income from continuing operations  
 | 
   
 | 
 $ 
 | 
 0.52 
 | 
   
 | 
 $ 
 | 
 0.42 
 | 
   
 | 
 $ 
 | 
 0.60 
 | 
   
 | 
 $ 
 | 
 0.70 
 | 
   
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 0.01 
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Basic earnings per share  
 | 
   
 | 
 $ 
 | 
 0.53 
 | 
   
 | 
 $ 
 | 
 0.42 
 | 
   
 | 
 $ 
 | 
 0.60 
 | 
   
 | 
 $ 
 | 
 0.70 
 | 
   
 | 
 
| 
 Diluted earnings per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income from continuing operations  
 | 
   
 | 
 $ 
 | 
 0.51 
 | 
   
 | 
 $ 
 | 
 0.41 
 | 
   
 | 
 $ 
 | 
 0.59 
 | 
   
 | 
 $ 
 | 
 0.68 
 | 
   
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 — 
 | 
   
 | 
 —  
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Diluted earnings per share  
 | 
   
 | 
 $ 
 | 
 0.51 
 | 
   
 | 
 $ 
 | 
 0.41 
 | 
   
 | 
 $ 
 | 
 0.59 
 | 
   
 | 
 $ 
 | 
 0.68 
 | 
   
 | 
 
 
  
| 
   
 | 
   
 | 
 Quarter Ended 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 Dec. 31, 
2010 
 | 
   
 | 
 March 31, 
2011 
 | 
   
 | 
 June 30, 
2011 
 | 
   
 | 
 Sept. 30, 
2011 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 (In thousands, except per share data) 
 | 
   
 | 
 
| 
 Fiscal Year 2011 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Revenue: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Health Services  
 | 
   
 | 
 $ 
 | 
 130,011 
 | 
   
 | 
 $ 
 | 
 137,779 
 | 
   
 | 
 $ 
 | 
 141,788 
 | 
   
 | 
 $ 
 | 
 156,303 
 | 
   
 | 
 
| 
 Human Services  
 | 
   
 | 
 84,103 
 | 
   
 | 
 89,337 
 | 
   
 | 
 96,508 
 | 
   
 | 
 93,804 
 | 
   
 | 
 
| 
 Total revenue  
 | 
   
 | 
 214,114 
 | 
   
 | 
 227,116 
 | 
   
 | 
 238,296 
 | 
   
 | 
 250,107 
 | 
   
 | 
 
| 
 Gross profit  
 | 
   
 | 
 55,959 
 | 
   
 | 
 63,066 
 | 
   
 | 
 66,399 
 | 
   
 | 
 68,227 
 | 
   
 | 
 
| 
 Selling, general and administrative expenses  
 | 
   
 | 
 28,667 
 | 
   
 | 
 33,572 
 | 
   
 | 
 35,259 
 | 
   
 | 
 34,560 
 | 
   
 | 
 
| 
 Operating income from continuing operations: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Health Services  
 | 
   
 | 
 18,823 
 | 
   
 | 
 19,352 
 | 
   
 | 
 15,923 
 | 
   
 | 
 20,617 
 | 
   
 | 
 
| 
 Human Services  
 | 
   
 | 
 8,503 
 | 
   
 | 
 10,123 
 | 
   
 | 
 14,908 
 | 
   
 | 
 13,288 
 | 
   
 | 
 
| 
 Consolidating adjustments  
 | 
   
 | 
 (34 
 | 
 ) 
 | 
 19 
 | 
   
 | 
 309 
 | 
   
 | 
 (238 
 | 
 ) 
 | 
 
| 
 Legal and settlement expense (recovery), net  
 | 
   
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 361 
 | 
   
 | 
 (1,169 
 | 
 ) 
 | 
 
| 
 Operating income from continuing operations  
 | 
   
 | 
 27,292 
 | 
   
 | 
 29,494 
 | 
   
 | 
 30,779 
 | 
   
 | 
 34,836 
 | 
   
 | 
 
| 
 Discontinued operations, net of income taxes  
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income/(loss) from discontinued operations  
 | 
   
 | 
 — 
 | 
   
 | 
 (265 
 | 
 ) 
 | 
 (65 
 | 
 ) 
 | 
 197 
 | 
   
 | 
 
| 
 Loss on disposal  
 | 
   
 | 
 (105 
 | 
 ) 
 | 
 (554 
 | 
 ) 
 | 
 (3 
 | 
 ) 
 | 
 (179 
 | 
 ) 
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 (105 
 | 
 ) 
 | 
 (819 
 | 
 ) 
 | 
 (68 
 | 
 ) 
 | 
 18 
 | 
   
 | 
 
| 
 Net income  
 | 
   
 | 
 $ 
 | 
 17,482 
 | 
   
 | 
 $ 
 | 
 18,219 
 | 
   
 | 
 $ 
 | 
 19,892 
 | 
   
 | 
 $ 
 | 
 25,575 
 | 
   
 | 
 
| 
 Basic earnings per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income from continuing operations  
 | 
   
 | 
 $ 
 | 
 0.51 
 | 
   
 | 
 $ 
 | 
 0.55 
 | 
   
 | 
 $ 
 | 
 0.58 
 | 
   
 | 
 $ 
 | 
 0.75 
 | 
   
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 — 
 | 
   
 | 
 (0.02 
 | 
 ) 
 | 
 (0.01 
 | 
 ) 
 | 
 — 
 | 
   
 | 
 
| 
 Basic earnings per share  
 | 
   
 | 
 $ 
 | 
 0.51 
 | 
   
 | 
 $ 
 | 
 0.53 
 | 
   
 | 
 $ 
 | 
 0.57 
 | 
   
 | 
 $ 
 | 
 0.75 
 | 
   
 | 
 
| 
 Diluted earnings per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Income from continuing operations  
 | 
   
 | 
 $ 
 | 
 0.50 
 | 
   
 | 
 $ 
 | 
 0.54 
 | 
   
 | 
 $ 
 | 
 0.56 
 | 
   
 | 
 $ 
 | 
 0.73 
 | 
   
 | 
 
| 
 Loss from discontinued operations  
 | 
   
 | 
 (0.01 
 | 
 ) 
 | 
 (0.03 
 | 
 ) 
 | 
 — 
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Diluted earnings per share  
 | 
   
 | 
 $ 
 | 
 0.49 
 | 
   
 | 
 $ 
 | 
 0.51 
 | 
   
 | 
 $ 
 | 
 0.56 
 | 
   
 | 
 $ 
 | 
 0.73 
 | 
   
 | 
 
 
  
 | 
 
 
 | 
 
 
 |