Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Minimum Rental Commitments Under Non-Cancelable Leases

The approximate minimum rental commitments for 2019 and thereafter under non-cancelable leases in effect at December 31, 2018 were as follows (in thousands):

2019	$	88,231
2020	81,252
2021	62,111
2022	47,268
2023	37,566
Thereafter	52,993
	$	369,421