Derivatives and Hedging Activities - Derivatives (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Cumulative basis adjustments for fair value hedges
Amortized cost of the Hedged Assets/Liabilities	$ 3,807,239
Hedged Asset, Statement of Financial Position [Extensible Enumeration]	Debt securities, available-for-sale
Amortized Cost of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/Liabilities	$ (17,988)
Interest rate Swap
Notional and estimated fair value amount of derivative positions
Notional Amount	1,500,000
Asset Derivative	0
Liability Derivative	$ 17,988
Remaining Maturity	2 years 1 month 6 days
Interest rate Swap | Interest income on investment securities
Fair value hedge relationships on the income statement
Gain (loss) on fair value hedges recognized in earnings	$ 1,607
AFS debt securities | Interest income on investment securities
Fair value hedge relationships on the income statement
Gain (loss) on fair value hedges recognized in earnings	$ (1,607)
Secured Overnight Financing Rate (SOFR) | Interest rate Swap
Notional and estimated fair value amount of derivative positions
Pay Rate	4.63%