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Fair Value Measurements - Schedule of Changes to Deferred Acquisition Consideration (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Other |  |  | $ (8,227,000) | $ (38,887,000) | $ (18,652,000)
Contingent Payment [Member] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Other | $ 9,211 | $ (41,913) | (7,972,000) | (36,344,000) | (16,467,000)
Contingent Payment [Member] | Fair Value, Inputs, Level 3 |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Beginning balance of contingent payments |  |  | 306,734,000 | 172,227,000 |
Payments |  |  | 105,169,000 | 77,301,000 |
Additions |  |  | 16,132,000 | 174,530,000 |
Redemption value adjustments |  |  | 13,930,000 | 41,636,000 |
Other |  |  | (6,412,000) | 0 |
Foreign translation adjustment |  |  | (461,000) | (4,358,000) |
Ending balance of contingent payments | $ 224,754,000 | $ 306,734,000 | $ 224,754,000 | $ 306,734,000 | $ 172,227,000

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