Loans (Narrative) (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Carrying value of PPP loans		$ 1,900	$ 38,000
Loans Receivable Net Deferred Cost Originated		10,000	6,700
Loans Receivable Net Deferred Premium on Purchased Loans		359	414
Accrued interest receivable on loans		11,600	10,300
Loans pledged as collateral		2,200,000	2,200,000
Past due loans included in nonaccrual loans		6,800	9,400
Nonaccrual loans with no ACL		4,300	4,200
Residential loans in process of foreclosure		4,200	1,500
Nonaccrual loans current on payment		5,600	4,800
Individually analyzed loans		14,400	21,100
Collateral dependent loans	[1]	4,479,822	4,272,925
Collateral Dependent Individually Analyzed
Collateral dependent loans		$ 7,801	$ 14,406

[1] Includes net unamortized loan origination costs of $10.0 million and $6.7 million, respectively, at June 30, 2022 and December 31, 2021 and net unamortized premiums on purchased loans of $359 thousand and $414 thousand, respectively, at June 30, 2022 and December 31, 2021.