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Leases - Balance Sheet and Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Assets Operating $ 28,142 $ 20,009
Assets Finance 49,022 51,443
Total lease assets 77,164 71,452
Liabilities Current Operating $ 1,010 $ 1,185
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued Liabilities, Current Accrued Liabilities, Current
Liabilities Noncurrent Operating $ 29,650 $ 20,704
Liabilities Noncurrent Finance 72,699 60,690
Total lease liabilities 103,359 82,579
Finance lease cost - amortization of right-of-use asset 2,421 2,424
Finance lease cost - interest expense on lease liability 4,074 3,596
Cost of sales    
Fixed operating lease cost 1,340 757
Research and development    
Fixed operating lease cost 1,030 950
Selling, general and administrative    
Fixed operating lease cost $ 2,049 $ 2,132