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Commitments and Contingencies - Minimum Aggregate Future Obligations Under Non-cancelable Leases and Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]      
2017 $ 53,410    
2018 45,202    
2019 44,586    
2020 54,206    
2021 54,934    
Thereafter 533,088    
Total 785,426    
Rent expense 50,300 $ 47,900 $ 39,900
Proceeds from sublease tenants 1,300 $ 3,600 $ 3,400
Letters of credit for real estate leases $ 6,800