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Fair Value Measurements - Narrative (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment of other assets | $ 0 | $ 14,000 |  |
Other Long-term Obligations |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability | 826,000 |  | $ 775,000 |
Accrued Liabilities |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability | 102,000 |  | 249,000 |
Contingent Consideration |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability (asset) | 928,000 | $ 1,842,000 | $ 1,024,000 | $ 1,886,000
Contingent Receivable [Member] | Contingent Consideration |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability (asset) | (681,000) |  |  |
Contingent Receivable [Member] | Contingent Consideration | Other Noncurrent Assets [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability (asset) | (512,000) |  |  |
Contingent Receivable [Member] | Contingent Consideration | Other Current Assets [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability (asset) | $ (169,000) |  |  |

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