Commitments and Contingencies Commitments and Contingencies (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2017
USD ($)
Operating Lease Commitments  
Operating Lease Commitments, Remainder of 2017 $ 19,963
Operating Lease Commitments, 2018 45,086
Operating Lease Commitments, 2019 46,511
Operating Lease Commitments, 2020 44,475
Operating Lease Commitments, 2021 43,602
Operating Lease Commitments, Thereafter 216,751
Operating Lease Commitments, Total 416,388
Expected Sublease Receipts  
Expected Sublease Receipts, Remainder of 2017 (2,339)
Expected Sublease Receipts, 2018 (7,972)
Expected Sublease Receipts, 2019 (8,603)
Expected Sublease Receipts, 2020 (5,920)
Expected Sublease Receipts, 2021 (717)
Expected Sublease Receipts, Thereafter (122)
Expected Sublease Receipts, Total (25,673)
Net  
Net, Remainder of 2017 17,624
Net, 2018 37,114
Net, 2019 37,908
Net, 2020 38,555
Net, 2021 42,885
Net, Thereafter 216,629
Net, Total 390,715
Lease Obligations and Related Exit Costs 10,300
Cease-Use Loss 4,800
Sublease Expenses $ 1,300