Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum rental payments under operating leases that have initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2017 are as follows:

(in thousands)
2018	$	27,860
2019	26,699
2020	22,709
2021	17,328
2022	9,777
Thereafter	62,175
	$	166,548