Fair Value Measurements Contingent Consideration Payable (Details) - Contingent Consideration [Member] - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Balance, beginning of period | $ 8,634 | $ 13,889 |
Issuance | 18,000 | 0 |
Payments of contingent consideration | (192) | (189) |
Balance, end of period | $ 26,442 | $ 13,700 |