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Commitments and Contingencies - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Operating Lease Costs        
Operating lease costs before capitalized operating lease costs $ 8,622 $ 8,305 $ 16,735 $ 16,603
Operating lease costs capitalized (791) (7) (1,537) (7)
Operating Lease, Cost 7,831 8,298 15,198 16,596
Finance Lease, Costs [Abstract]        
Interest on financing leases before capitalized interest 2,149 808 3,812 1,612
Interest on financing leases capitalized (1,043) 0 (1,790) 0
Interest on financing leases, net 1,106 808 2,022 1,612
Amortization of right-of-use assets 305 305 610 610
Financing lease costs, net $ 1,411 $ 1,113 $ 2,632 $ 2,222