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Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Loans [Line Items]
Non- accrual loans	$ 33,212		$ 33,212		$ 16,512
Total past due and non-accrual	41,510		41,510		19,593
Total loans	7,478,438		7,478,438		7,220,469
Non-accrual loans with a related allowance	12,691		12,691		6,845
Non-accrual loans with no related allowance	20,521		20,521		9,667
Non-accrual interest income	0	$ 0	0	$ 0
Commercial Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	11,189		11,189		11,300
Total past due and non-accrual	16,431		16,431		12,971
Total loans	4,349,012		4,349,012		4,251,780
Non-accrual loans with a related allowance	9,194		9,194		2,788
Non-accrual loans with no related allowance	1,995		1,995		8,512
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual loans	2,284		2,284		2,601
Total past due and non-accrual	7,135		7,135		3,573
Total loans	1,940,200		1,940,200		2,024,835
Non-accrual loans with a related allowance	2,284		2,284		1,640
Non-accrual loans with no related allowance					961
Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,013,272		1,013,272		959,626
Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	1,661		1,661		6,551
Total past due and non-accrual	1,872		1,872		6,551
Total loans	1,075,380		1,075,380		913,340
Non-accrual loans with a related allowance	237		237		693
Non-accrual loans with no related allowance	1,424		1,424		5,858
Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Non- accrual loans	7,244		7,244		2,148
Total past due and non-accrual	7,424		7,424		2,847
Total loans	320,160		320,160		353,979
Non-accrual loans with a related allowance	6,673		6,673		455
Non-accrual loans with no related allowance	571		571		1,693
Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	13,537		13,537		685
Total past due and non-accrual	13,763		13,763		1,314
Total loans	1,814,059		1,814,059		1,696,050
Non-accrual loans with a related allowance	65		65		685
Non-accrual loans with no related allowance	13,472		13,472
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	327,756		327,756		341,325
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	98,412		98,412		129,102
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	328,534		328,534		213,677
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	13,537		13,537		685
Total past due and non-accrual	13,763		13,763		1,314
Total loans	1,059,357		1,059,357		1,011,946
Non-accrual loans with a related allowance	65		65		685
Non-accrual loans with no related allowance	13,472		13,472
Residential Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	8,424		8,424		4,515
Total past due and non-accrual	11,174		11,174		5,216
Total loans	1,295,991		1,295,991		1,251,281
Non-accrual loans with a related allowance	3,376		3,376		3,360
Non-accrual loans with no related allowance	5,048		5,048		1,155
Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Non- accrual loans	7,662		7,662		4,174
Total past due and non-accrual	9,604		9,604		4,620
Total loans	1,205,502		1,205,502		1,154,348
Non-accrual loans with a related allowance	2,914		2,914		3,019
Non-accrual loans with no related allowance	4,748		4,748		1,155
Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Non- accrual loans	762		762		341
Total past due and non-accrual	1,570		1,570		596
Total loans	90,489		90,489		96,933
Non-accrual loans with a related allowance	462		462		341
Non-accrual loans with no related allowance	300		300
Consumer Loan [Member]
Loans [Line Items]
Non- accrual loans	62		62		12
Total past due and non-accrual	142		142		92
Total loans	19,376		19,376		21,358
Non-accrual loans with a related allowance	56		56		12
Non-accrual loans with no related allowance	6		6
30-89 Days Past Due
Loans [Line Items]
Total loans	8,144		8,144		2,986
30-89 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	5,102		5,102		1,618
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	4,851		4,851		919
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	211		211
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	40		40		699
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	226		226		629
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	226		226		629
30-89 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	2,742		2,742		701
30-89 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	1,934		1,934		446
30-89 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	808		808		255
30-89 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	74		74		38
Greater than 90 Days Past Due
Loans [Line Items]
Total loans	154		154		95
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	140		140		53
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans					53
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	140		140
Greater than 90 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	8		8
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	8		8
Greater than 90 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	6		6		42
Current
Loans [Line Items]
Total loans	7,436,928		7,436,928		7,200,876
Current | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	4,332,581		4,332,581		4,238,809
Current | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	1,933,065		1,933,065		2,021,262
Current | Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,013,272		1,013,272		959,626
Current | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,073,508		1,073,508		906,789
Current | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	312,736		312,736		351,132
Current | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,800,296		1,800,296		1,694,736
Current | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	327,756		327,756		341,325
Current | Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	98,412		98,412		129,102
Current | Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	328,534		328,534		213,677
Current | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,045,594		1,045,594		1,010,632
Current | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,284,817		1,284,817		1,246,065
Current | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	1,195,898		1,195,898		1,149,728
Current | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	88,919		88,919		96,337
Current | Consumer Loan [Member]
Loans [Line Items]
Total loans	$ 19,234		$ 19,234		$ 21,266

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