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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Lease Payments on Operating Leases
The future minimum lease payments on operating leases at December 31, 2016 are as follows (in thousands):

 
 
2017
$
98,833

2018
98,251

2019
95,956

2020
92,655

2021
88,154

Thereafter
967,634

Total
$
1,441,483