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Business combinations (Details 3) (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
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Sep. 30, 2012
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Sep. 30, 2011
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| Business combinations | |||||||||||
| 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 |
| Income from continuing operations | 117,125 | 76,099 | 82,142 | ||||||||
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HML
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| Business combinations | |||||||||||
| Revenue | 14,100 | ||||||||||
| Income from continuing operations | 500 | ||||||||||
| Pro forma information | |||||||||||
| Revenue | 1,368,399 | 1,093,389 | |||||||||
| Income from continuing operations | $ 120,182 | $ 77,469 | |||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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