Fair Value Measurements - Schedule of Activity of Major Classes of Assets Measured at Fair Value Using Level 3 Inputs (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, Other Assets:Note Receivable	$ 0	$ 22,879
Unrealized gain on convertible note receivable included in other comprehensive income		2,121
Amendment of the convertible note receivable for preferred stock of the issuer and cash		(25,000)
Ending balance, Other Assets:Note Receivable	0	0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, Other Liabilities:Contingent Consideration Obligation	(900)	(2,600)
Ending balance, Other Liabilities:Contingent Consideration Obligation	0	(900)
Velocius
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value adjustment to contingent consideration for acquisition included in general and administrative expense	(100)	(300)
Achievement of milestone related to Velocius contingent consideration	$ 1,000	$ 2,000