Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments under Operating Leases

he future minimum annual cash payments under these operating lease agreements as of December 31, 2017 was as follows (in thousands):  

Year ended December 31,
2018	$	129,570
2019	121,543
2020	113,612
2021	106,371
2022	97,225
Thereafter	727,405
Total minimum lease payments (1)	$	1,295,726

(1) Excludes approximately $284.0 million of sublease income.