Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.4.0.3
Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Revenue:        
Revenue $ 606,453 $ 481,794 $ 1,163,175 $ 948,837
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit $ 147,667 $ 124,345 $ 257,882 $ 243,612
Gross profit (as a percent) 24.30% 25.80% 22.20% 25.70%
Selling, general and administrative expense:        
Selling, general and administrative expenses $ 65,976 $ 59,392 $ 130,210 $ 111,353
Selling, general, and administrative expense (as a percent) 10.90% 12.30% 11.20% 11.70%
Operating income:        
Amortization of intangible assets $ (3,262) $ (1,432) $ (6,411) $ (2,907)
Acquisition-related expenses (529) (1,514) (575) (2,114)
Operating income $ 77,900 $ 62,007 $ 120,686 $ 127,238
Operating income (as a percent) 12.80% 12.90% 10.40% 13.40%
Segment Reconciling Items        
Operating income:        
Amortization of intangible assets $ (3,262) $ (1,432) $ (6,411) $ (2,907)
Acquisition-related expenses (529) (1,514) (575) (2,114)
Other        
Selling, general and administrative expense:        
Selling, general and administrative expenses 0 95 650 100
Operating income:        
Other 0 (95) (650) (100)
Health Services | Operating Segments        
Revenue:        
Revenue $ 330,567 $ 270,918 $ 622,470 $ 514,488
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit $ 82,717 $ 69,873 $ 134,689 $ 129,720
Gross profit (as a percent) 25.00% 25.80% 21.60% 25.20%
Selling, general and administrative expense:        
Selling, general and administrative expenses $ 25,803 $ 28,397 $ 50,967 $ 50,404
Selling, general, and administrative expense (as a percent) 7.80% 10.50% 8.20% 9.80%
Operating income:        
Operating income $ 56,914 $ 41,476 $ 83,722 $ 79,316
Operating income (as a percent) 17.20% 15.30% 13.40% 15.40%
U.S. Federal Services | Operating Segments        
Revenue:        
Revenue $ 150,191 $ 99,465 $ 295,476 $ 207,194
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit $ 33,421 $ 22,014 $ 61,659 $ 47,582
Gross profit (as a percent) 22.30% 22.10% 20.90% 23.00%
Selling, general and administrative expense:        
Selling, general and administrative expenses $ 18,438 $ 12,377 $ 35,960 $ 24,627
Selling, general, and administrative expense (as a percent) 12.30% 12.40% 12.20% 11.90%
Operating income:        
Operating income $ 14,983 $ 9,637 $ 25,699 $ 22,955
Operating income (as a percent) 10.00% 9.70% 8.70% 11.10%
Human Services | Operating Segments        
Revenue:        
Revenue $ 125,695 $ 111,411 $ 245,229 $ 227,155
Revenue (as a percent) 100.00% 100.00% 100.00% 100.00%
Gross profit:        
Gross profit $ 31,529 $ 32,458 $ 61,534 $ 66,310
Gross profit (as a percent) 25.10% 29.10% 25.10% 29.20%
Selling, general and administrative expense:        
Selling, general and administrative expenses $ 21,735 $ 18,523 $ 42,633 $ 36,222
Selling, general, and administrative expense (as a percent) 17.30% 16.60% 17.40% 15.90%
Operating income:        
Operating income $ 9,794 $ 13,935 $ 18,901 $ 30,088
Operating income (as a percent) 7.80% 12.50% 7.70% 13.20%