Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2020 and December 31, 2019, were as follows:

	Fair Value Measurement at March 31, 2020 Using
			Quoted Prices in		Significant
			Active Markets		Other		Significant
			for Identical		Observable		Unobservable
			Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Interest rate swap derivative instruments – net liability position	$	(98,269)	$	—	$	(98,269)	$	—
Restricted cash and investments	$	134,934	$	—	$	134,934	$	—
Contingent consideration	$	(67,599)	$	—	$	—	$	(67,599)

	Fair Value Measurement at December 31, 2019 Using
			Quoted Prices in		Significant
			Active Markets		Other		Significant
			for Identical		Observable		Unobservable
			Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Interest rate swap derivative instruments – net liability position	$	(39,802)	$	—	$	(39,802)	$	—
Restricted cash and investments	$	147,318	$	—	$	147,318	$	—
Contingent consideration	$	(69,484)	$	—	$	—	$	(69,484)

Fair Value for Level 3 Liabilities

The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2020 and 2019:

	Three Months Ended March 31,
	2020		2019
Beginning balance	$	69,484	$	54,615
Payment of contingent consideration recorded at acquisition date		(1,976)		(275)
Adjustments to contingent consideration		—		1,466
Interest accretion expense		416		455
Foreign currency translation adjustment		(325)		75
Ending balance	$	67,599	$	56,336