Other Borrowings - Summary of Terms of Outstanding Junior Subordinated Debentures (Details) - Trust Preferred Securities - Junior Subordinated Debentures	9 Months Ended
Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Issuance Amount	$ 136,643,000
Bridgeview Statutory Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	9.21%
Bridgeview Statutory Trust I \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	3.58%
Bridgeview Capital Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	8.92%
Bridgeview Capital Trust II \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	3.35%
First Midwest Capital Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 37,825,000
Variable rate (in percent)	6.95%
Rate	6.95%
St. Joseph Capital Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,155,000
Rate	7.42%
St. Joseph Capital Trust II \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.75%
Northern States Statutory Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 10,310,000
Rate	7.47%
Northern States Statutory Trust I \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.80%
Anchor Capital Trust III
Debt Instrument [Line Items]
Issuance Amount	$ 5,000,000
Rate	7.21%
Anchor Capital Trust III \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.55%
Great Lakes Statutory Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 6,186,000
Rate	7.07%
Great Lakes Statutory Trust II \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.40%
Home Federal Statutory Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 15,464,000
Rate	7.32%
Home Federal Statutory Trust I \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.65%
Monroe Bancorp Capital Trust I
Debt Instrument [Line Items]
Issuance Amount	$ 3,093,000
Rate	7.17%
Monroe Bancorp Capital Trust I \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.60%
Tower Capital Trust 3
Debt Instrument [Line Items]
Issuance Amount	$ 9,279,000
Rate	7.36%
Tower Capital Trust 3 \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.69%
Monroe Bancorp Statutory Trust II
Debt Instrument [Line Items]
Issuance Amount	$ 5,155,000
Rate	7.27%
Monroe Bancorp Statutory Trust II \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.60%
Great Lakes Statutory Trust III
Debt Instrument [Line Items]
Issuance Amount	$ 8,248,000
Rate	7.37%
Great Lakes Statutory Trust III \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Variable rate (in percent)	1.70%