Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Measurement

Schedule of fair value of financial instruments

	Carrying		Fair		Fair Value Measurements
As of March 31, 2019	Amount		Value		Level 1		Level 2		Level 3
Recurring and nonrecurring assets and liabilities:
Acquisition contingent liability	$	721	$	721	$	—	$	—	$	721
Long-term debt		1,336,152		1,377,941		—		1,377,941		—
Interest rate swap		2,160		2,160		—		2,160		—
Goodwill		708,285		708,285		—		—		708,285

	Carrying		Fair		Fair Value Measurements
As of December 31, 2018	Amount		Value		Level 1		Level 2		Level 3
Recurring and nonrecurring assets and liabilities:
Acquisition contingent liability	$	721	$	721	$	—	$	—	$	721
Long-term debt		1,306,423		1,316,306		—		1,316,306		—
Interest rate swap		3,836		3,836		—		3,836		—
Goodwill		708,258		708,258		—		—		708,258

Schedule of net assets and liabilities classified as Level 3 for reconciliation

	March 31,		December 31,
	2019		2018
Balance as of January 1,	$	721	$	721
Payments/Reductions		—		—
Balance as of March 31,	$	721	$	721