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Loans - Loan Delinquency (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Loans [Line Items]
Non- accrual loans	$ 9,546		$ 16,512
Total past due and non-accrual	12,039		19,593
Total loans	7,345,298		7,220,469
Non-accrual loans with a related allowance	6,101		6,845
Non-accrual loans with no related allowance	3,445		9,667
Non-accrual interest income	0	$ 0
Commercial Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	4,451		11,300
Total past due and non-accrual	5,891		12,971
Total loans	4,228,950		4,251,780
Non-accrual loans with a related allowance	2,446		2,788
Non-accrual loans with no related allowance	2,005		8,512
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Non- accrual loans	1,631		2,601
Total past due and non-accrual	2,855		3,573
Total loans	1,990,783		2,024,835
Non-accrual loans with a related allowance	1,631		1,640
Non-accrual loans with no related allowance			961
Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	980,117		959,626
Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	2,200		6,551
Total past due and non-accrual	2,200		6,551
Total loans	923,114		913,340
Non-accrual loans with a related allowance	781		693
Non-accrual loans with no related allowance	1,419		5,858
Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Non- accrual loans	620		2,148
Total past due and non-accrual	836		2,847
Total loans	334,936		353,979
Non-accrual loans with a related allowance	34		455
Non-accrual loans with no related allowance	586		1,693
Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	149		685
Total past due and non-accrual	149		1,314
Total loans	1,824,524		1,696,050
Non-accrual loans with a related allowance	149		685
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	341,197		341,325
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	123,696		129,102
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	270,532		213,677
Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Non- accrual loans	149		685
Total past due and non-accrual	149		1,314
Total loans	1,089,099		1,011,946
Non-accrual loans with a related allowance	149		685
Residential Portfolio Segment [Member]
Loans [Line Items]
Non- accrual loans	4,873		4,515
Total past due and non-accrual	5,888		5,216
Total loans	1,271,798		1,251,281
Non-accrual loans with a related allowance	3,440		3,360
Non-accrual loans with no related allowance	1,433		1,155
Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Non- accrual loans	4,268		4,174
Total past due and non-accrual	4,931		4,620
Total loans	1,181,673		1,154,348
Non-accrual loans with a related allowance	3,138		3,019
Non-accrual loans with no related allowance	1,130		1,155
Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Non- accrual loans	605		341
Total past due and non-accrual	957		596
Total loans	90,125		96,933
Non-accrual loans with a related allowance	302		341
Non-accrual loans with no related allowance	303
Consumer Loan [Member]
Loans [Line Items]
Non- accrual loans	73		12
Total past due and non-accrual	111		92
Total loans	20,026		21,358
Non-accrual loans with a related allowance	66		12
Non-accrual loans with no related allowance	7
30-89 Days Past Due
Loans [Line Items]
Total loans	2,308		2,986
30-89 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,299		1,618
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	1,224		919
30-89 Days Past Due | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	75		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	975		701
30-89 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	633		446
30-89 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	342		255
30-89 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	34		38
Greater than 90 Days Past Due
Loans [Line Items]
Total loans	185		95
Greater than 90 Days Past Due | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	141		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	141
Greater than 90 Days Past Due | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	40
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	30
Greater than 90 Days Past Due | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	10
Greater than 90 Days Past Due | Consumer Loan [Member]
Loans [Line Items]
Total loans	4		42
Current
Loans [Line Items]
Total loans	7,333,259		7,200,876
Current | Commercial Portfolio Segment [Member]
Loans [Line Items]
Total loans	4,223,059		4,238,809
Current | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans [Line Items]
Total loans	1,987,928		2,021,262
Current | Commercial Portfolio Segment [Member] | Municipal Securities [Member]
Loans [Line Items]
Total loans	980,117		959,626
Current | Commercial Portfolio Segment [Member] | Owner-Occupied [Member]
Loans [Line Items]
Total loans	920,914		906,789
Current | Commercial Portfolio Segment [Member] | Agriculture [Member]
Loans [Line Items]
Total loans	334,100		351,132
Current | Commercial Real Estate Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,824,375		1,694,736
Current | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans [Line Items]
Total loans	341,197		341,325
Current | Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition/Development [Member]
Loans [Line Items]
Total loans	123,696		129,102
Current | Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Loans [Line Items]
Total loans	270,532		213,677
Current | Commercial Real Estate Portfolio Segment [Member] | Non Owner-Occupied [Member]
Loans [Line Items]
Total loans	1,088,950		1,010,632
Current | Residential Portfolio Segment [Member]
Loans [Line Items]
Total loans	1,265,910		1,246,065
Current | Residential Portfolio Segment [Member] | Sr lien [Member]
Loans [Line Items]
Total loans	1,176,742		1,149,728
Current | Residential Portfolio Segment [Member] | Jr Lien 1-4 Family Closed End [Member]
Loans [Line Items]
Total loans	89,168		96,337
Current | Consumer Loan [Member]
Loans [Line Items]
Total loans	$ 19,915		$ 21,266

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