Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018 and 2017, 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, 2018			(Level 1)		(Level 2)			(Level 3)
Interest rate contracts (1)	$	5,772		$	—	$	5,772		$	—
Foreign currency contract assets, current and long-term (2)	$	1,578		$	—	$	1,578		$	—
Foreign currency contract liabilities, current and long-term (3)	$	(1,608	)	$	—	$	(1,608	)	$	—
				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	)	$	—

(1)    The fair value of the interest rate contracts is determined using Level 2 fair value inputs and is recorded as other long-term 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, 2018 and 2017, consisted of the following (in thousands):

	2018			2017
Beginning balance	$	10,956		$	683
Contingent consideration liability recorded as the result of acquisitions (see Note 3)	72,209			10,400
Fair value adjustments recorded to income during the period	(698		)	(66		)
Contingent payments made	(231		)	(61		)
Ending balance	$	82,236		$	10,956

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, 2018 and 2017 (amounts in thousands):

Contingent consideration asset or liability	Fair value at December 31, 2018		Valuation technique	Unobservable inputs	Range
Revenue-based royalty	$	10,661	Discounted cash flow	Discount rate	9.9% - 25%
payments contingent liability				Projected year of payments	2018-2037
Supply chain milestone	$	13,593	Discounted cash flow	Discount rate	5.3%
contingent liability				Probability of milestone payment	95%
				Projected year of payments	2019
Revenue milestones	$	57,982	Discounted cash flow	Discount rate	3.3% - 13%
contingent liability				Projected year of payments	2019-2023
Contingent receivable	$	607	Discounted cash flow	Discount rate	10%
asset				Probability of milestone payment	67%
				Projected year of payments	2019
Contingent consideration asset or liability	Fair value at December 31, 2017		Valuation technique	Unobservable inputs	Range
Revenue-based royalty	$	10,956	Discounted cash flow	Discount rate	9.9% - 15%
payments contingent liability				Projected year of payments	2017-2037
Contingent receivable	$	760	Discounted cash flow	Discount rate	10%
asset				Probability of milestone payment	75%
				Projected year of payments	2018-2019