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Leases and Other - Components of Least Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Finance lease cost:        
Amortization of right-of-use assets $ 923 $ 609 $ 1,841 $ 1,198
Interest on lease liabilities 412 182 829 249
Operating lease cost 6,912 6,839 13,639 12,831
Short-term lease cost 32 562 342 777
Variable lease cost 1,359 1,402 3,058 3,217
Sublease income [1]   (54)   (226)
Total lease cost, net $ 9,638 $ 9,540 $ 19,709 $ 18,046
[1]   Sublease income excludes rental income from owned assets, which is recorded in revenue.