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Loans and Allowance for Credit Losses - Aging in past due loans and nonaccrual status, with and without an ACL, by loan segment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Aging of the recorded investment in past due loans by loan segment
Nonaccrual with ACL	$ 74
Nonaccrual without ACL	675	$ 639
Totals	3,722,271	3,569,446
Current
Aging of the recorded investment in past due loans by loan segment
Totals	3,721,511	3,568,621
30-89 Days Past Due
Aging of the recorded investment in past due loans by loan segment
Totals	11	186
Commercial
Aging of the recorded investment in past due loans by loan segment
Nonaccrual with ACL	74
Nonaccrual without ACL	95
Totals	459,063	435,344
Commercial | Current
Aging of the recorded investment in past due loans by loan segment
Totals	458,883	435,274
Commercial | 30-89 Days Past Due
Aging of the recorded investment in past due loans by loan segment
Totals	11	70
Paycheck Protection Program (PPP), CARES Act
Aging of the recorded investment in past due loans by loan segment
Totals	791	1,049
Paycheck Protection Program (PPP), CARES Act | Current
Aging of the recorded investment in past due loans by loan segment
Totals	791	1,049
Construction and Land Development
Aging of the recorded investment in past due loans by loan segment
Nonaccrual without ACL	86	106
Totals	294,818	295,554
Construction and Land Development | Current
Aging of the recorded investment in past due loans by loan segment
Totals	294,732	295,448
1-4 Family Construction
Aging of the recorded investment in past due loans by loan segment
Totals	64,463	70,242
1-4 Family Construction | Current
Aging of the recorded investment in past due loans by loan segment
Totals	64,463	70,242
HELOC and 1-4 Family Junior Mortgage
Aging of the recorded investment in past due loans by loan segment
Totals		36,875
HELOC and 1-4 Family Junior Mortgage | Current
Aging of the recorded investment in past due loans by loan segment
Totals		36,875
1st REM - 1-4 Family
Aging of the recorded investment in past due loans by loan segment
Totals		50,945
1st REM - 1-4 Family | Current
Aging of the recorded investment in past due loans by loan segment
Totals		50,945
LOCs and 2nd REM - Rentals
Aging of the recorded investment in past due loans by loan segment
Totals		27,985
LOCs and 2nd REM - Rentals | Current
Aging of the recorded investment in past due loans by loan segment
Totals		27,985
1st REM - Rentals
Aging of the recorded investment in past due loans by loan segment
Totals		239,669
1st REM - Rentals | Current
Aging of the recorded investment in past due loans by loan segment
Totals		239,553
1st REM - Rentals | 30-89 Days Past Due
Aging of the recorded investment in past due loans by loan segment
Totals		116
1-4 Family Mortgage
Aging of the recorded investment in past due loans by loan segment
Totals	404,716	355,474
1-4 Family Mortgage | Current
Aging of the recorded investment in past due loans by loan segment
Totals	404,716
Multifamily
Aging of the recorded investment in past due loans by loan segment
Totals	1,378,669	1,306,738
Multifamily | Current
Aging of the recorded investment in past due loans by loan segment
Totals	1,378,669	1,306,738
CRE Owner Occupied
Aging of the recorded investment in past due loans by loan segment
Nonaccrual without ACL	494	533
Totals	159,485	149,905
CRE Owner Occupied | Current
Aging of the recorded investment in past due loans by loan segment
Totals	158,991	149,372
CRE Non-owner Occupied
Aging of the recorded investment in past due loans by loan segment
Totals	951,263	947,008
CRE Non-owner Occupied | Current
Aging of the recorded investment in past due loans by loan segment
Totals	951,263	947,008
Consumer and other
Aging of the recorded investment in past due loans by loan segment
Totals	9,003	8,132
Consumer and other | Current
Aging of the recorded investment in past due loans by loan segment
Totals	$ 9,003	$ 8,132

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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