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Leases (Leases) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lease cost for operating leases      
Operating lease cost $ 40,381 $ 39,411 $ 38,710
Amortization of leased assets 3,424    
Interest on leased liabilities 152    
Total lease cost 43,957 39,411 38,710
Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities 40,249 39,212 38,226
Operating cash flows from finance leases 152    
Financing cash flows from finance leases 3,133    
Right-of-use assets obtained in exchange for lease liabilities - operating leases 17,933 15,117 $ 17,774
Right-of-use assets obtained in exchange for lease liabilities - finance lease $ 10,012 $ 3,754  
Weighted average remaining lease term - operating leases 8 years 8 years 7 months 6 days 8 years 8 months 12 days
Weighted average remaining lease term - finance leases 4 years 10 months 24 days 5 years 4 months 24 days  
Weighted average discount rate - operating leases 3.37% 3.86% 3.99%
Weighted average discount rate - finance leases 1.89% 1.89%