Derivative Instruments - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) instrument	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) instrument	Sep. 30, 2022 USD ($)	Dec. 31, 2019 USD ($) contract	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) instrument	Apr. 30, 2022 USD ($) instrument
Derivatives, Fair Value [Line Items]
Net unrealized losses in accumulated other comprehensive expected to be reclassified into expense in the next twelve months	$ 300,000		$ 300,000
Interest Rate Swap Contracts
Derivatives, Fair Value [Line Items]
Notional amount						$ 50,000,000
Unrealized gain (loss)	(200,000)		(200,000)
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts
Derivatives, Fair Value [Line Items]
Net unrealized losses in accumulated other comprehensive expected to be reclassified into expense in the next twelve months	700,000		700,000
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Federal Home Loan Bank Advances
Derivatives, Fair Value [Line Items]
Number of instruments terminated | contract					16
Gain on termination of cash flow hedge					$ 8,900,000
FHLB, advances, reduction of interest expense	$ 300,000	$ 300,000	$ 1,000,000.0	$ 1,000,000.0
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Federal Home Loan Bank Advances | Minimum
Derivatives, Fair Value [Line Items]
Average remaining maturity					1 month
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Federal Home Loan Bank Advances | Maximum
Derivatives, Fair Value [Line Items]
Average remaining maturity					7 years
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Junior subordinated debentures
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	5		5				5
Notional amount	$ 64,200,000		$ 64,200,000				$ 64,200,000
Amount of hedged item	64,200,000		64,200,000				$ 64,200,000
Unrealized gain (loss)	200,000	8,000	300,000	(300,000)
Derivatives Designated as Hedging Instruments | Variable Interest Rate
Derivatives, Fair Value [Line Items]
Notional amount						$ 50,000,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument							143
Notional amount	$ 969,400,000		$ 969,400,000				$ 925,400,000
Derivatives Not Designated as Hedging Instruments | Credit Risk Contract
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	4		4				4
Notional amount	$ 72,600,000		$ 72,600,000				$ 74,000,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	15		15				19
Notional amount	$ 353,400,000		$ 353,400,000				$ 448,800,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Third party broker
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	14		14				16
Notional amount	$ 332,400,000		$ 332,400,000				$ 371,900,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contract | Third party broker
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	1		1				4	4
Notional amount	$ 35,000,000		$ 35,000,000				$ 140,000,000	$ 140,000,000
Derivatives Not Designated as Hedging Instruments | Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Notional amount	92,400,000		92,400,000				77,000,000
Derivatives Not Designated as Hedging Instruments | Forward contracts
Derivatives, Fair Value [Line Items]
Notional amount	36,500,000		36,500,000				$ 17,000,000
Gain due to change in fair value	$ 100,000	$ 100,000	$ 100,000	$ 300,000