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