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Business Acquisitions, Goodwill and Intangible Assets - Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2017
Business Acquisitions, Goodwill and Intangible Assets
Severance and personnel costs	$ 18,400	$ 29,900
Professional service, real estate-related, and other expenses	1,600	5,500
Total	$ 19,997	35,409
Severance expense		$ 7,700

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This element represents acquisition-related costs for professional service, real estate-related, and other expenses incurred in connection with a business combination.

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This element represents acquisition-related costs for severance and personnel costs incurred in connection with a business combination.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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