XML 50 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1
Assets and Liabilities Measured at Fair Value - Level 3 Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning of the period $ 26,800 $ 265,350 $ 25,400 $ 269,722
Payment of contingent consideration in cash 0 0 0 (10,000)
Changes in fair value during the period, included in statement of operations 1,300 (244,250) 2,700 (238,622)
Balance, end of the period $ 28,100 $ 21,100 $ 28,100 $ 21,100