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Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 9,691 $ 10,276  
Variable lease cost 3,135 6,867  
Total lease cost 12,826 17,143  
Cash paid for amounts included in the measurement of operating lease liabilities 3,690 9,986  
Right-of-use assets 78,899 84,979  
Current (included in Accrued liabilites - Other in our Consolidated Balance Sheet 6,222 811  
Lease liability $ 78,688 $ 84,528  
Weighted-average remaining lease term - operating leases (years) 15 years 15 years  
Weighted-average discount rate - operating leases 4.66% 4.65%  
Prior to adopting ASU 2016, total rent expense     $ 10,800
2021 $ 9,471    
2022 9,611    
2023 9,614    
2024 9,316    
2025 9,065    
Thereafter 74,330    
Total future lease payments 121,407    
Less amount representing interest 36,497    
Total obligations under operating leases $ 84,910