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Accumulated Other Comprehensive Income (Changes in Other Comprehensive Income by Components) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance $ 1,085,975 $ 1,045,478    
Ending balance 1,069,160 1,085,975 $ 1,045,478  
Net Unrealized Gains On Securities Available-For-Sale        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 12,092 (441) (10,972)  
Transfer of securities held-to-maturity to available-for-sale     (12,041)  
Other comprehensive income (loss) before reclassifications (6,454) 7,803 14,335  
Amounts reclassified out of accumulated other comprehensive (loss) income 25 4,730 8,237  
Other comprehensive income (loss) (6,429) 12,533 10,531  
Ending balance 5,663 12,092 (441) $ (10,972)
Net Unrealized Loss On Cash Flow Hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (1,070) (567) 9  
Transfer of securities held-to-maturity to available-for-sale     0  
Other comprehensive income (loss) before reclassifications (1,074) (2,491) (2,442)  
Amounts reclassified out of accumulated other comprehensive (loss) income 1,641 1,988 1,866  
Other comprehensive income (loss) 567 (503) (576)  
Ending balance (503) (1,070) (567) 9
Accumulated Other Comprehensive (Loss) Income        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 11,022 (1,008) (10,963)  
Transfer of securities held-to-maturity to available-for-sale     (12,041)  
Other comprehensive income (loss) before reclassifications (7,528) 5,312 11,893  
Amounts reclassified out of accumulated other comprehensive (loss) income 1,666 6,718 10,103  
Other comprehensive income (loss) (5,862) 12,030 9,955  
Ending balance $ 5,160 $ 11,022 $ (1,008) (10,963)
Accumulated Other Comprehensive (Loss) Income | Cumulative effect adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Transfer of securities held-to-maturity to available-for-sale       $ 424,700