Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Our financial assets and (liabilities) carried at fair value measured on a recurring basis as of December 31, 2017 and 2016, consisted of the following (in thousands):

				Fair Value Measurements Using
	Total Fair			Quoted prices in		Significant other			Significant
	Value at			active markets		observable inputs			unobservable inputs
Description	December 31, 2017			(Level 1)		(Level 2)			(Level 3)
Interest rate contracts (1)	$	5,749		$	—	$	5,749		$	—
Foreign currency contract assets, current and long-term (2)	$	621		$	—	$	621		$	—
Foreign currency contract liabilities, current and long-term (3)	$	(1,391	)	$	—	$	(1,391	)	$	—
				Fair Value Measurements Using
	Total Fair			Quoted prices in		Significant other			Significant
	Value at			active markets		observable inputs			unobservable inputs
Description	December 31, 2016			(Level 1)		(Level 2)			(Level 3)
Interest rate contracts (1)	$	4,991		$	—	$	4,991		$	—
Foreign currency contract assets, current and long-term (2)	$	354		$	—	$	354		$	—
Foreign currency contract liabilities, current and long-term (3)	$	(464	)	$	—	$	(464	)	$	—

(1)    The fair value of the interest rate contracts is determined using Level 2 fair value inputs and is recorded as other assets or other long-term obligations in the consolidated balance sheets.

(2)    The fair value of the foreign currency contract assets (including those designated as hedging instruments and those not designated as hedging instruments) is determined using Level 2 fair value inputs and is recorded as prepaid and other assets or other long-term assets in the consolidated balance sheets.

(3)    The fair value of the foreign currency contract liabilities (including those designated as hedging instruments and those not designated as hedging instruments) is determined using Level 2 fair value inputs and is recorded as accrued expenses or other long-term obligations in the consolidated balance sheets.

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

Changes in the fair value of our contingent consideration liability during the years ended December 31, 2017 and 2016, consisted of the following (in thousands):

	2017			2016
Beginning balance	$	683		$	1,024
Contingent consideration liability recorded as the result of acquisitions (see Note 2)	10,400			—
Fair value adjustments recorded to income during the period	(66		)	(123		)
Contingent payments made	(61		)	(218		)
Ending balance	$	10,956		$	683

Fair Value Inputs, Liabilities, Quantitative Information

The recurring Level 3 measurement of our contingent consideration liability and contingent receivable includes the following significant unobservable inputs at December 31, 2017 and 2016 (amounts in thousands):

Contingent consideration asset or liability	Fair value at December 31, 2017		Valuation technique	Unobservable inputs	Range
Revenue-based payments	$	10,956	Discounted cash flow	Discount rate	9.9% - 15%
contingent liability				Probability of milestone payment	100%
				Projected year of payments	2018-2037
Contingent receivable	$	760	Discounted cash flow	Discount rate	10%
asset				Probability of milestone payment	75%
				Projected year of payments	2018-2019
Contingent consideration asset or liability	Fair value at December 31, 2016		Valuation technique	Unobservable inputs	Range
Revenue-based payments	$	683	Discounted cash flow	Discount rate	9.9% - 15%
contingent liability				Probability of milestone payment	100%
				Projected year of payments	2017-2028
Contingent receivable	$	528	Discounted cash flow	Discount rate	10%
asset				Probability of milestone payment	57%
				Projected year of payments	2017-2019