Loans (Narrative) (Details) $ in Thousands		Mar. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($)
Carrying value of PPP loans		$ 12,500	$ 38,000
Loans Receivable Net Deferred Cost Originated		8,300	6,700
Loans Receivable Net Deferred Premium on Purchased Loans		389	414
Accrued interest receivable on loans		10,600	10,300
Loans pledged as collateral		$ 2,200,000
Number of executed loan modifications due to COVID-19 | loan		654
Amount of executed loan modifications due to COVID-19		$ 727,700
Past due loans included in nonaccrual loans		5,700	9,400
Nonaccrual loans with no ACL		4,200	4,200
Residential loans in process of foreclosure		1,700	1,500
Nonaccrual loans current on payment		6,900	4,800
Individually analyzed loans		21,000	21,100
Collateral dependent loans	[1]	4,283,852	4,272,925
Collateral Dependent Individually Analyzed
Collateral dependent loans		$ 14,369	$ 14,406

[1] Includes net unamortized loan origination costs of $8.3 million and $6.7 million, respectively, at March 31, 2022 and December 31, 2021 and net unamortized premiums on purchased loans of $389 thousand and $414 thousand, respectively, at March 31, 2022 and December 31, 2021.