Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Year ending December 31,	(in thousands)
2019	$	39,031
2020		36,210
2021		35,311
2022		33,624
2023		16,336
Thereafter		28,916
	$	189,428

Operating Leases of Lessee Disclosure

(in thousands)	2018			2017			2016
Rent	$	34,924		$	36,269		$	39,537
Sublease income		(45	)		(142	)		(147	)
Total rent expense	$	34,879		$	36,127		$	39,390