Commitments and Credit Risk (Schedule of Commitments) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Total commitments	$ 2,712,189	$ 2,912,871
Commitments To Originate Loans [Member]
Loss Contingencies [Line Items]
Total commitments	118,369	134,961
Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Total commitments	66,851	66,889
Lines Of Credit [Member]
Loss Contingencies [Line Items]
Total commitments	2,518,588	2,705,730
Future Lease Commitments [Member]
Loss Contingencies [Line Items]
Total commitments	5,833	1,888
Commitments Related To Investment Fund [Member]
Loss Contingencies [Line Items]
Total commitments	$ 2,548	$ 3,403