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Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Loans [Line Items]
Non- accrual loans	$ 35,817		$ 28,228
Total past due and non-accrual	39,313		41,051
Total loans	7,569,052		7,698,758
Non-accrual loans with a related allowance	31,962		25,431
Non-accrual loans with no related allowance	3,855		2,797
Non-accrual interest income	0	$ 0
Commercial Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	15,045		8,767
Total past due and non-accrual	15,593		17,958
Total loans	4,381,780		4,499,035
Non-accrual loans with a related allowance	14,398		8,181
Non-accrual loans with no related allowance	647		586
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual loans	8,817		2,250
Total past due and non-accrual	9,316		11,429
Total loans	1,909,860		1,966,909
Non-accrual loans with a related allowance	8,756		2,250
Non-accrual loans with no related allowance	61
Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,062,581		1,083,756
Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	752		755
Total past due and non-accrual	801		755
Total loans	1,109,789		1,123,773
Non-accrual loans with a related allowance	752		755
Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Non- accrual loans	5,476		5,762
Total past due and non-accrual	5,476		5,774
Total loans	299,550		324,597
Non-accrual loans with a related allowance	4,890		5,176
Non-accrual loans with no related allowance	586		586
Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	13,472		13,472
Total past due and non-accrual	14,044		14,609
Total loans	1,860,199		1,856,750
Non-accrual loans with a related allowance	13,472		13,472
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	356,564		405,250
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total past due and non-accrual			1,077
Total loans	90,323		100,096
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	347,421		311,770
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	13,472		13,472
Total past due and non-accrual	14,044		13,532
Total loans	1,065,891		1,039,634
Non-accrual loans with a related allowance	13,472		13,472
Residential Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	7,250		5,936
Total past due and non-accrual	9,424		8,299
Total loans	1,310,204		1,323,787
Non-accrual loans with a related allowance	4,042		3,725
Non-accrual loans with no related allowance	3,208		2,211
Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Non- accrual loans	6,293		5,488
Total past due and non-accrual	7,028		6,948
Total loans	1,219,645		1,233,599
Non-accrual loans with a related allowance	3,613		3,277
Non-accrual loans with no related allowance	2,680		2,211
Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Non- accrual loans	957		448
Total past due and non-accrual	2,396		1,351
Total loans	90,559		90,188
Non-accrual loans with a related allowance	429		448
Non-accrual loans with no related allowance	528
Consumer Loan [Member]
Loans [Line Items]
Non- accrual loans	50		53
Total past due and non-accrual	252		185
Total loans	16,869		19,186
Non-accrual loans with a related allowance	50		53
30-89 Days Past Due
Loans [Line Items]
Total loans	3,495		12,232
30-89 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	548		9,179
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	499		9,179
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	49
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	572		1,137
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans			1,077
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	572		60
30-89 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	2,174		1,785
30-89 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	735		1,410
30-89 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	1,439		375
30-89 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	201		131
Greater than 90 Days Past Due
Loans [Line Items]
Total loans	1		591
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans			12
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans			12
Greater than 90 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans			578
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans			50
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans			528
Greater than 90 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	1		1
Current
Loans [Line Items]
Total loans	7,529,739		7,657,707
Current | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	4,366,187		4,481,077
Current | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	1,900,544		1,955,480
Current | Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,062,581		1,083,756
Current | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,108,988		1,123,018
Current | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	294,074		318,823
Current | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,846,155		1,842,141
Current | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	356,564		405,250
Current | Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	90,323		99,019
Current | Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	347,421		311,770
Current | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,051,847		1,026,102
Current | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,300,780		1,315,488
Current | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	1,212,617		1,226,651
Current | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	88,163		88,837
Current | Consumer Loan [Member]
Loans [Line Items]
Total loans	$ 16,617		$ 19,001

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