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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Par amount of advance made and reported by Federal Home Loan Bank (FHLBank) with fixed interest rate maturing after next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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FEDERAL HOME LOAN BANK AND FEDERAL RESERVE BANK ADVANCES AND OTHER BORROWINGS - Schedule of Federal Home Loan Bank Advances (Details)		1 Months Ended			3 Months Ended	12 Months Ended
	Jun. 30, 2019	Apr. 30, 2027	Sep. 30, 2025	Aug. 31, 2022	Mar. 31, 2022 USD ($) borrowing	Dec. 31, 2021 USD ($)
Summary of Federal Home Loan Bank advances
Federal Home Loan Bank advances, net					$ 85,530,000	$ 111,527,000
Long-term debt, gross					172,592,000	169,953,000
Banks available and unused portion of borrowing agreement					240,412,000	204,271,000
Maximum month-end amounts outstanding					111,530,000	123,530,000
Senior Notes - Variable Rate due June 2031 \| Revolving Credit Facility
Summary of Federal Home Loan Bank advances
Maximum borrowing capacity						5,000,000
FHLB
Summary of Federal Home Loan Bank advances
FHLB advances, maturity 2021					0	11,000,000
FHLB advances, maturity 2022					5,000,000	20,000,000
FHLB advances, maturity 2023					20,530,000	20,530,000
FHLB advances, maturity 2024					5,000,000	5,000,000
FHLB advances, maturity 2025					42,500,000	42,500,000
FHLB advances, maturity 2029					12,500,000	12,500,000
FHLB advances, maturity 2030
FHLB advances, maturities summary					85,530,000	111,530,000
Less: unamortized debt issuance costs					0	(3,000)
Federal Home Loan Bank advances, net					85,530,000	111,527,000
FHLB advances					$ 931,498,000	$ 861,900,000
Number of FHLB borrowings maturing within twelve months \| borrowing					0
Weighted-average interest rate (as a percent)						2.45%
FHLB \| Minimum
Summary of Federal Home Loan Bank advances
Range of stated rates, 2021 (as a percent)					0.00%	2.45%
Range of stated rates, 2022 (as a percent)					1.43%	1.43%
Range of stated rates, 2023 (as a percent)					0.00%	0.00%
Range of stated rates, 2024 (as a percent)					1.45%	1.45%
Range of stated rates, 2025 (as a percent)					1.00%	1.00%
Range of stated rates, 2029 (as a percent)					0.52%	0.52%
Range of stated rates, 2030 (as a percent)
FHLB \| Maximum
Summary of Federal Home Loan Bank advances
Range of stated rates, 2021 (as a percent)					0.00%	2.45%
Range of stated rates, 2022 (as a percent)					1.44%	1.44%
Range of stated rates, 2023 (as a percent)					1.45%	1.45%
Range of stated rates, 2024 (as a percent)					1.45%	1.45%
Range of stated rates, 2025 (as a percent)					1.13%	1.13%
Range of stated rates, 2029 (as a percent)					0.86%	0.86%
Range of stated rates, 2030 (as a percent)
Senior Notes
Summary of Federal Home Loan Bank advances
Less: unamortized debt issuance costs					$ (1,188,000)	$ (430,000)
Long-term debt, gross					87,062,000	58,426,000
Senior Notes \| Senior Notes
Summary of Federal Home Loan Bank advances
Long-term debt, gross					$ 23,250,000	$ 28,856,000
Senior Notes \| Senior Notes \| Prime Rate
Summary of Federal Home Loan Bank advances
Basis spread on variable rate (as a percent)	0.75%
Senior Notes \| Senior Notes \| Minimum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)	3.00%				3.00%	3.00%
Senior Notes \| Senior Notes \| Maximum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					3.00%	3.50%
Subordinated Notes
Summary of Federal Home Loan Bank advances
Long-term debt, gross					$ 65,000,000	$ 30,000,000
Subordinated Notes \| Subordinated Notes due 2027
Summary of Federal Home Loan Bank advances
Long-term debt, gross					$ 15,000,000	$ 15,000,000
Stated interest rate (as a percent)					6.75%
Debt instrument, term					5 years
Subordinated Notes \| Subordinated Notes due 2027 \| LIBOR \| Forecast
Summary of Federal Home Loan Bank advances
Basis spread on variable rate (as a percent)				4.90%
Subordinated Notes \| Subordinated Notes due 2027 \| Minimum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					6.75%	6.75%
Subordinated Notes \| Subordinated Notes due 2027 \| Maximum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					6.75%	6.75%
Subordinated Notes \| Subordinated Notes due 2030
Summary of Federal Home Loan Bank advances
Long-term debt, gross					$ 15,000,000	$ 15,000,000
Stated interest rate (as a percent)					6.00%
Debt instrument, term					5 years
Subordinated Notes \| Subordinated Notes due 2030 \| Secured Overnight Financing Rate (SOFR) \| Forecast
Summary of Federal Home Loan Bank advances
Basis spread on variable rate (as a percent)			5.91%
Subordinated Notes \| Subordinated Notes due 2030 \| Minimum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					6.00%	6.00%
Subordinated Notes \| Subordinated Notes due 2030 \| Maximum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					6.00%	6.00%
Subordinated Notes \| Subordinated Notes due 2032
Summary of Federal Home Loan Bank advances
Long-term debt, gross					$ 35,000,000
Stated interest rate (as a percent)					4.75%
Debt instrument, term					5 years
Subordinated Notes \| Subordinated Notes due 2032 \| Secured Overnight Financing Rate (SOFR) \| Forecast
Summary of Federal Home Loan Bank advances
Basis spread on variable rate (as a percent)		3.29%
Subordinated Notes \| Subordinated Notes due 2032 \| Minimum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					4.75%
Subordinated Notes \| Subordinated Notes due 2032 \| Maximum
Summary of Federal Home Loan Bank advances
Stated interest rate (as a percent)					4.75%
Federal Home Loan Bank Advances
Summary of Federal Home Loan Bank advances
FHLB, advances					$ 55,000,000