Leases (Operating and Finance Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Asset, operating	$ 65,330	$ 68,048
Asset, finance	5,936	6,478
Total leased assets	71,266	74,526
Present value of lease liabilities	65,841	68,343
Present value of lease liabilities	5,915	6,308
Total lease liabilities	$ 71,756	$ 74,651