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Business segments (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2013
segment
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Sep. 30, 2012
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Sep. 30, 2011
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| Business segments | |||||||||||
| Number of business segments | 2 | ||||||||||
| Financial information for each of the Company's business segments | |||||||||||
| Revenue | $ 384,339 | $ 334,323 | $ 326,351 | $ 286,266 | $ 300,737 | $ 266,353 | $ 243,452 | $ 239,603 | $ 1,331,279 | $ 1,050,145 | $ 929,633 |
| Gross profit | 117,499 | 94,560 | 97,444 | 76,530 | 84,629 | 78,701 | 64,766 | 59,847 | 386,033 | 287,943 | 253,651 |
| Selling, general, and administrative expense | 197,859 | 157,402 | 132,058 | ||||||||
| Operating income from continuing operations (before income taxes) | 186,208 | 127,575 | 122,401 | ||||||||
| Acquisition-related expenses and legal and settlement recovery (expense), net | (1,966) | (2,966) | 808 | ||||||||
| Depreciation and amortization | 35,816 | 26,460 | 22,845 | ||||||||
| Identifiable assets | 857,978 | 695,293 | 857,978 | 695,293 | |||||||
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Operating segments | Health Services
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| Financial information for each of the Company's business segments | |||||||||||
| Revenue | 862,879 | 671,181 | 565,881 | ||||||||
| Gross profit | 248,100 | 172,456 | 147,239 | ||||||||
| Selling, general, and administrative expense | 118,266 | 91,837 | 72,524 | ||||||||
| Operating income from continuing operations (before income taxes) | 129,834 | 80,619 | 74,715 | ||||||||
| Depreciation and amortization | 17,438 | 14,257 | 12,120 | ||||||||
| Identifiable assets | 518,914 | 266,017 | 518,914 | 266,017 | |||||||
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Operating segments | Human Services
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| Financial information for each of the Company's business segments | |||||||||||
| Revenue | 468,400 | 378,964 | 363,752 | ||||||||
| Gross profit | 137,933 | 115,487 | 106,412 | ||||||||
| Selling, general, and administrative expense | 79,842 | 65,565 | 59,590 | ||||||||
| Operating income from continuing operations (before income taxes) | 58,091 | 49,922 | 46,822 | ||||||||
| Depreciation and amortization | 13,722 | 8,790 | 7,842 | ||||||||
| Identifiable assets | 221,604 | 305,376 | 221,604 | 305,376 | |||||||
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Corporate/Other
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| Financial information for each of the Company's business segments | |||||||||||
| Selling, general, and administrative expense | (249) | (56) | |||||||||
| Operating income from continuing operations (before income taxes) | 249 | 56 | |||||||||
| Depreciation and amortization | 4,656 | 3,413 | 2,883 | ||||||||
| Identifiable assets | $ 117,460 | $ 123,900 | $ 117,460 | $ 123,900 | |||||||