Leases Assets and Liabilities, Lessee (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 40,979	$ 46,571	[1]
Operating Lease, Liability, Current	8,669	8,740
Operating Lease, Liability, Noncurrent	35,478	41,019
Operating Lease, Liability	$ 44,147	$ 49,759
Operating Lease, Weighted Average Remaining Lease Term	6 years 2 months 12 days	6 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	4.98%	5.02%
Finance Lease, Right-of-Use Asset	$ 2,690	$ 2,915
Finance Lease, Liability, Current	624	554
Finance Lease, Liability, Noncurrent	2,122	2,388
Finance Lease, Liability	$ 2,746	$ 2,942
Finance Lease, Weighted Average Remaining Lease Term	5 years 9 months 18 days	6 years 4 months 24 days
Finance Lease, Weighted Average Discount Rate, Percent	4.27%	4.27%

[1] December 31, 2020 balances were derived from audited consolidated financial statements.