Quarterly report pursuant to Section 13 or 15(d)

Segment information (Details)

v2.4.0.8
Segment information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Revenue:        
Revenue $ 419,899 $ 334,323 $ 1,265,506 $ 946,940
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit 112,603 94,560 339,191 268,534
Gross profit (as a percent) 27.00% 28.30% 26.80% 28.40%
Selling, general, and administrative expense:        
Selling, general and administrative expense 57,345 49,181 165,077 138,096
Selling, general, and administrative expense (as a percent) 13.70% 14.70% 13.00% 14.60%
Operating income from continuing operations:        
Operating income from continuing operations 55,258 44,387 173,514 129,140
Operating income from continuing operations (as a percent) 13.20% 13.30% 13.70% 13.60%
Acquisition-related expenses   1,174   1,500
Legal and settlement expense   (182) 600 (202)
Operating Segments [Member]
        
Operating income from continuing operations:        
Operating income from continuing operations 55,258 45,379 174,114 130,438
Operating income from continuing operations (as a percent) 13.20% 13.60% 13.80% 13.80%
Corporate, Non-Segment [Member]
        
Selling, general, and administrative expense:        
Selling, general and administrative expense       (383)
Operating income from continuing operations:        
Operating income from continuing operations       383
Health Services [Member] | Operating Segments [Member]
        
Revenue:        
Revenue 305,647 217,901 928,865 591,847
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit 79,679 62,868 241,558 162,778
Gross profit (as a percent) 26.10% 28.90% 26.00% 27.50%
Selling, general, and administrative expense:        
Selling, general and administrative expense 37,430 28,507 108,980 78,882
Selling, general, and administrative expense (as a percent) 12.20% 13.10% 11.70% 13.30%
Operating income from continuing operations:        
Operating income from continuing operations 42,249 34,361 132,578 83,896
Operating income from continuing operations (as a percent) 13.80% 15.80% 14.30% 14.20%
Human Services [Member] | Operating Segments [Member]
        
Revenue:        
Revenue 114,252 116,422 336,641 355,093
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit 32,924 31,692 97,633 105,756
Gross profit (as a percent) 28.80% 27.20% 29.00% 29.80%
Selling, general, and administrative expense:        
Selling, general and administrative expense 19,915 20,674 56,097 59,597
Selling, general, and administrative expense (as a percent) 17.40% 17.80% 16.70% 16.80%
Operating income from continuing operations:        
Operating income from continuing operations $ 13,009 $ 11,018 $ 41,536 $ 46,159
Operating income from continuing operations (as a percent) 11.40% 9.50% 12.30% 13.00%