Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Schedule by Year of Future Minimum Lease Payments for Noncancelable Operating Leases

The following is a schedule by year of future minimum lease payments for noncancelable operating leases as of December 31, 2018 (dollars in thousands):

2019	$	238,954
2020		219,351
2021		202,205
2022		172,267
2023		145,705
Thereafter		510,741
Total minimum payment required	$	1,489,223

Composition of Total Rental Expense under Noncancelable

The composition of total rental expense under noncancelable operating leases consisted of the following (dollars in thousands):

	Year Ended December 31,
		2018			2017			2016
Minimum rentals	$	294,107		$	276,676		$	252,285
Less sublease rentals		(2,808	)		(3,446	)		(4,322	)
	$	291,299		$	273,230		$	247,963