Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Commitments And Contingencies [Line Items]
Allowance for credit loss	$ 42,452	$ 46,365	$ 42,452	$ 46,365	$ 40,966	$ 39,676	$ 49,828	$ 52,420
Unfunded Commitments [Member] | Provision for Credit Losses [Member]
Commitments And Contingencies [Line Items]
Credit loss (benefit) expense	119	$ (765)	360	$ (1,040)
Unfunded Commitments [Member] | Other Liabilities [Member]
Commitments And Contingencies [Line Items]
Allowance for credit loss	$ 2,200		$ 2,200			$ 1,800