Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Commitments for Leases

Future minimum commitments for leases as of December31, 2017 were as follows (in thousands):

	Operating		Capital
	Leases		Leases
2018	$	224,630	$	127,180
2019		204,335		137,313
2020		175,612		167,281
2021		156,552		138,042
2022		130,802		133,772
Thereafter		425,295		81,627
Total minimum lease payments	$	1,317,226		785,215
Less: Amounts representing interest not yet incurred				99,181
Present value of capital lease obligations				686,034
Less: Current portion				96,700
Long-term portion of capital lease obligations			$	589,334