Commitments and Contingencies (Future Minimum Payments Under Lease Financing Obligations and Non-Cancelable Operating Leases) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2017	$ 64,502
2018	76,310
2019	68,456
2020	66,603
2021	57,434
Thereafter	307,535
Total minimum payments	$ 640,840

Capital and Operating Leases, Future Minimum Payments Due

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Capital and Operating Leases, Future Minimum Payments, Due Thereafter

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Capital and Operating Leases, Future Minimum Payments, Due in Five Years

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Capital and Operating Leases, Future Minimum Payments, Due in Four Years

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Capital and Operating Leases, Future Minimum Payments, Due in Three Years

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Capital and Operating Leases, Future Minimum Payments, Due in Two Years

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Capital and Operating Leases, Future Minimum Payments, Next Twelve Months

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