Fair Value of Financial Instruments - Changes in Level 3 Financial Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Change in fair value of contingent consideration	$ 0	$ 18,357,000	$ 841,000
Level 3
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance		12,554,000
Non-cash noncontrolling interest equity issuance		(3,533,000)
Change in fair value of contingent consideration		18,357,000
Gross transfers out of Level 3		$ (27,378,000)
Ending Balance			$ 12,554,000