Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Components of Lease Expense (Details)

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Commitments and Contingencies - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Finance lease cost:    
Finance lease cost, amortization of right-of-use assets $ 2,657 $ 3,484
Finance lease cost, interest on lease liabilities 217 239
Operating lease cost 3,126 2,879
Short-term lease cost 120 524
Variable lease cost 810 877
Sublease income (160) (156)
Total lease cost $ 6,770 $ 7,847