Loans (Narrative) (Details) $ in Thousands		Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Individually analyzed loans		$ 7,100
Total loans	[1]	4,287,641	$ 3,892,999
Carrying value of PPP loans		212,200
Net unamortized loan origination (fees) costs		(453)	5,300
Net unamortized premiums on purchased loans		1,100	995
Loans pledged as collateral		2,200,000	2,100,000
Past due loans included in nonaccrual loans		10,600	11,500
Nonaccrual loans with no ACL		1,400
Residential loans in process of foreclosure		3,400	5,800
Nonaccrual loans current on payment		$ 5,500	$ 5,900
Number of loan modifications due to COVID-19		583
Balance of loan modifications due to COVID-19		$ 652,200
Number of loans ineligible for TDR relief under CARES Act		12
Balances of loans ineligible for TDR relief under CARES Act		$ 5,600
Collateral Dependent Individually Analyzed
Total loans		$ 4,263

[1] Includes net unamortized loan origination fees of $453 thousand at June 30, 2020 and net unamortized loan origination costs of $5.3 million, at December 31, 2019 and net unamortized premiums on purchased loans of $1.1 million and $995 thousand, respectively, at June 30, 2020 and December 31, 2019.