Leases and Other Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Leases And Other Commitments [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

At December 31, 2017, future minimum rental payments under noncancelable operating leases approximate the following:

(in thousands)
2018	$	97,935
2019	88,298
2020	70,500
2021	56,693
2022	43,976
Thereafter	121,875
	$	479,277