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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]        
Operating lease costs $ 11,800 $ 11,044 $ 23,599 $ 21,909
Short-term lease costs 487 566 1,009 1,429
Variable lease costs 2,846 2,685 5,832 5,698
Sublease income (1,041) (1,246) (2,130) (2,443)
Total lease cost, net $ 14,092 $ 13,049 $ 28,310 $ 26,593