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Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Other comprehensive income (loss), Pre-tax Amount $ 13,600 $ (72,451)
Other comprehensive income (loss), Tax Effect 3,485 (18,564)
Total other comprehensive income (loss), net of tax 10,115 (53,887)
Securities Available for Sale and Transferred Securities [Member]    
Other comprehensive income (loss), before Reclassifications, Pre-tax Amount (891) (75,017)
Reclassification, Pre-tax Amount [1] 19 31
Other comprehensive income (loss), Pre-tax Amount 14,297 (74,986)
Other comprehensive income (loss), before Reclassifications, Tax Effect (228) (19,221)
Reclassification, Tax Effect [1] 5 8
Other comprehensive income (loss), Tax Effect 3,663 (19,213)
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (663) (55,796)
Reclassification, Net of tax amount [1] 14 23
Total other comprehensive income (loss), net of tax 10,634 (55,773)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]    
Other comprehensive income (loss), Pre-tax Amount 14,278 2,471
Other comprehensive income (loss), Tax Effect 3,658 633
Total other comprehensive income (loss), net of tax 10,620 1,838
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member]    
Other comprehensive income (loss), Pre-tax Amount (122) 0
Other comprehensive income (loss), Tax Effect (31) 0
Total other comprehensive income (loss), net of tax (91) 0
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]    
Other comprehensive income (loss), Pre-tax Amount 316 64
Other comprehensive income (loss), Tax Effect 81 16
Total other comprehensive income (loss), net of tax 235 48
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]    
Other comprehensive income (loss), Pre-tax Amount 194 64
Other comprehensive income (loss), Tax Effect 50 16
Total other comprehensive income (loss), net of tax $ 144 $ 48
[1] Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.