Derivative Instruments - Notional and Fair Value Amounts of Derivative Instruments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Assets	$ 959,342	$ 940,010
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of Hedged Assets	$ 80,038	$ 104,408
Hedged Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	Investment securities - Available-for-sale	Investment securities - Available-for-sale
Fair Value Hedging
Derivatives, Fair Value [Line Items]
Derivative assets, weighted average pay rate	1.21%	1.21%
Derivative assets, notional amount	$ 1,001,715	$ 1,001,715
Derivative assets, fair value	79,743	102,644
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative assets, notional amount	689,471	551,314
Derivative assets, fair value	28,427	27,627
Derivative liabilities, notional amount	690,409	552,274
Derivative liabilities, fair value	$ 28,397	$ 27,584