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Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Loans [Line Items]
Non- accrual loans	$ 33,514		$ 33,514		$ 16,512
Total past due and non-accrual	41,021		41,021		19,593
Total loans	7,414,357		7,414,357		7,220,469
Non-accrual loans with a related allowance	29,553		29,553		6,845
Non-accrual loans with no related allowance	3,961		3,961		9,667
Non-accrual interest income	0	$ 0	0	$ 0
Commercial Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	27,653		27,653		11,300
Total past due and non-accrual	32,744		32,744		12,971
Total loans	4,256,694		4,256,694		4,251,780
Non-accrual loans with a related allowance	25,648		25,648		2,788
Non-accrual loans with no related allowance	2,005		2,005		8,512
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual loans	1,915		1,915		2,601
Total past due and non-accrual	6,617		6,617		3,573
Total loans	1,951,853		1,951,853		2,024,835
Non-accrual loans with a related allowance	1,915		1,915		1,640
Non-accrual loans with no related allowance					961
Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,022,724		1,022,724		959,626
Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	2,061		2,061		6,551
Total past due and non-accrual	2,149		2,149		6,551
Total loans	956,113		956,113		913,340
Non-accrual loans with a related allowance	642		642		693
Non-accrual loans with no related allowance	1,419		1,419		5,858
Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Non- accrual loans	23,677		23,677		2,148
Total past due and non-accrual	23,978		23,978		2,847
Total loans	326,004		326,004		353,979
Non-accrual loans with a related allowance	23,091		23,091		455
Non-accrual loans with no related allowance	586		586		1,693
Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	135		135		685
Total past due and non-accrual	135		135		1,314
Total loans	1,891,945		1,891,945		1,696,050
Non-accrual loans with a related allowance	135		135		685
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	356,072		356,072		341,325
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	131,211		131,211		129,102
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	292,074		292,074		213,677
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	135		135		685
Total past due and non-accrual	135		135		1,314
Total loans	1,112,588		1,112,588		1,011,946
Non-accrual loans with a related allowance	135		135		685
Residential Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	5,660		5,660		4,515
Total past due and non-accrual	8,039		8,039		5,216
Total loans	1,245,905		1,245,905		1,251,281
Non-accrual loans with a related allowance	3,710		3,710		3,360
Non-accrual loans with no related allowance	1,950		1,950		1,155
Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Non- accrual loans	4,879		4,879		4,174
Total past due and non-accrual	7,162		7,162		4,620
Total loans	1,156,249		1,156,249		1,154,348
Non-accrual loans with a related allowance	3,229		3,229		3,019
Non-accrual loans with no related allowance	1,650		1,650		1,155
Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Non- accrual loans	781		781		341
Total past due and non-accrual	877		877		596
Total loans	89,656		89,656		96,933
Non-accrual loans with a related allowance	481		481		341
Non-accrual loans with no related allowance	300		300
Consumer Loan [Member]
Loans [Line Items]
Non- accrual loans	66		66		12
Total past due and non-accrual	103		103		92
Total loans	19,813		19,813		21,358
Non-accrual loans with a related allowance	60		60		12
Non-accrual loans with no related allowance	6		6
30-89 Days Past Due
Loans [Line Items]
Total loans	7,261		7,261		2,986
30-89 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	4,879		4,879		1,618
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	4,631		4,631		919
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	88		88
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	160		160		699
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans					629
30-89 Days Past Due | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans					629
30-89 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	2,348		2,348		701
30-89 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	2,283		2,283		446
30-89 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	65		65		255
30-89 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	34		34		38
Greater than 90 Days Past Due
Loans [Line Items]
Total loans	246		246		95
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	212		212		53
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	71		71		53
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	141		141
Greater than 90 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	31		31
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	31		31
Greater than 90 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	3		3		42
Current
Loans [Line Items]
Total loans	7,373,336		7,373,336		7,200,876
Current | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	4,223,950		4,223,950		4,238,809
Current | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	1,945,236		1,945,236		2,021,262
Current | Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	1,022,724		1,022,724		959,626
Current | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	953,964		953,964		906,789
Current | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	302,026		302,026		351,132
Current | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,891,810		1,891,810		1,694,736
Current | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	356,072		356,072		341,325
Current | Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	131,211		131,211		129,102
Current | Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	292,074		292,074		213,677
Current | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,112,453		1,112,453		1,010,632
Current | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,237,866		1,237,866		1,246,065
Current | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	1,149,087		1,149,087		1,149,728
Current | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	88,779		88,779		96,337
Current | Consumer Loan [Member]
Loans [Line Items]
Total loans	$ 19,710		$ 19,710		$ 21,266

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