Leases (Operating and Finance Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Asset, operating	$ 68,048	$ 77,115
Asset, finance	6,478	8,820
Total leased assets	$ 74,526	$ 85,935
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities	us-gaap:OtherLiabilities
Present value of lease liabilities	$ 68,343	$ 76,746
Present value of lease liabilities	6,308	8,230
Total lease liabilities	$ 74,651	$ 84,976