Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative Assets (Included in Other Assets)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Notional Amount	$ 905,409	$ 976,963
Derivative financial assets	$ 93,601	$ 83,456
Derivative Liabilities (Included in Other Liabilities)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Notional Amount	$ 1,405,409	$ 1,476,707
Derivative financial liabilities	120,106	104,817
Interest rate swap contracts—commercial loans
Derivative Assets (Included in Other Assets)
Derivative financial assets	93,601	83,449
Derivative Liabilities (Included in Other Liabilities)
Derivative financial liabilities	120,106	104,817
Designated as Hedging Instruments
Derivative Assets (Included in Other Assets)
Notional Amount	0	0
Derivative financial assets	0	0
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	500,000	500,000
Derivative financial liabilities	25,668	21,368
Designated as Hedging Instruments | Cash Flow Hedge
Derivative Assets (Included in Other Assets)
Notional Amount	0	0
Derivative financial assets	0	0
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	500,000	500,000
Derivative financial liabilities	25,668	21,368
Not Designated as Hedging Instruments
Derivative Assets (Included in Other Assets)
Notional Amount	905,409	976,963
Derivative financial assets	93,601	83,456
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	905,409	976,707
Derivative financial liabilities	94,438	83,449
Not Designated as Hedging Instruments | Interest rate swap contracts—commercial loans
Derivative Assets (Included in Other Assets)
Notional Amount	905,409	976,707
Derivative financial assets	93,601	83,449
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	905,409	976,707
Derivative financial liabilities	94,438	83,449
Not Designated as Hedging Instruments | Interest rate lock commitments
Derivative Assets (Included in Other Assets)
Notional Amount	0	126
Derivative financial assets	0	5
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	0	0
Derivative financial liabilities	0	0
Not Designated as Hedging Instruments | Forward sale contracts—mortgage loans
Derivative Assets (Included in Other Assets)
Notional Amount	0	130
Derivative financial assets	0	2
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	0	0
Derivative financial liabilities	$ 0	$ 0