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Other Comprehensive Income (Loss) - Accumulated Balances for Each Component of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shareholders’ equity $ 2,297,383 $ 2,136,016 $ 2,209,853 $ 2,132,733
Total accumulated other comprehensive loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shareholders’ equity (154,256) (209,037) (10,443) $ 25,068
Unrealized losses on securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shareholders’ equity (163,484) (219,766) (9,116)  
Unrealized gains on derivative instruments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shareholders’ equity 17,051 18,956 3,963  
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shareholders’ equity $ (7,823) $ (8,227) $ (5,290)