Contractual Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Details)	1 Months Ended		6 Months Ended
	Mar. 31, 2015 term	Mar. 31, 2014 term	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Payment to acquire equity method investment			$ 3,000,000	$ 1,800,000
Remaining capital commitment			0
Contingent consideration obligations			40,000,000		$ 40,000,000
Letters of credit outstanding amount			0
Letter of Credit
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Letter of credit issued			1,600,000
IT Services Agreement
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
IT service agreement extension term	2 years
Number of renewal terms option one | term	1
Renewal term option one (in months)	12 months
Commitments under agreement			422,200,000
EU IT Services Agreement
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Number of renewal terms option one | term		1
Renewal term option one (in months)		12 months
Commitments under agreement			$ 27,300,000
Number of renewal terms option two | term		1
Renewal term option two (in months)		24 months