Loans Held for Investment - Schedule of Recorded Investment in Criticized Loans by Class and Credit Quality Indicator (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Impaired financing receivable, recorded investment	$ 191,400,000		$ 191,400,000
Commitments to purchase or sell	0	$ 0	0	$ 0
Proceeds from sale of loans held-for-investment	0	$ 0	0	$ 0
Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	794,400,000		794,400,000		$ 512,000,000.0
2021	822,400,000		822,400,000		470,600,000
2020	677,800,000		677,800,000		242,300,000
2019	487,500,000		487,500,000		151,100,000
2018	309,600,000		309,600,000		77,300,000
Prior	942,600,000		942,600,000		425,000,000.0
Revolving Loans Amortized Cost Basis	27,500,000		27,500,000		15,300,000
Total	4,061,800,000		4,061,800,000		1,893,600,000
Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	129,400,000		129,400,000		113,800,000
2021	145,000,000.0		145,000,000.0		41,800,000
2020	31,900,000		31,900,000		34,200,000
2019	25,600,000		25,600,000		15,400,000
2018	12,600,000		12,600,000		20,200,000
Prior	31,000,000.0		31,000,000.0		21,200,000
Revolving Loans Amortized Cost Basis	17,700,000		17,700,000		1,200,000
Total	393,200,000		393,200,000		247,800,000
Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	104,200,000		104,200,000		112,400,000
2021	134,300,000		134,300,000		7,400,000
2020	400,000		400,000		13,700,000
2019	9,200,000		9,200,000		900,000
2018	400,000		400,000		400,000
Prior	5,900,000		5,900,000		0
Revolving Loans Amortized Cost Basis	247,000,000.0		247,000,000.0		127,200,000
Total	501,400,000		501,400,000		262,000,000.0
Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	363,100,000		363,100,000		209,700,000
2021	469,000,000.0		469,000,000.0		141,400,000
2020	204,000,000.0		204,000,000.0		118,800,000
2019	76,200,000		76,200,000		27,600,000
2018	500,000		500,000		0
Prior	0		0		500,000
Revolving Loans Amortized Cost Basis	15,600,000		15,600,000		0
Total	1,128,400,000		1,128,400,000		498,000,000.0
Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	165,600,000		165,600,000		62,400,000
2021	192,300,000		192,300,000		38,600,000
2020	128,500,000		128,500,000		37,300,000
2019	73,000,000.0		73,000,000.0		23,300,000
2018	60,800,000		60,800,000		13,200,000
Prior	129,400,000		129,400,000		33,300,000
Revolving Loans Amortized Cost Basis	51,300,000		51,300,000		5,800,000
Total	800,900,000		800,900,000		213,900,000
Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	279,200,000		279,200,000		273,100,000
2021	195,500,000		195,500,000		209,100,000
2020	144,900,000		144,900,000		108,700,000
2019	69,300,000		69,300,000		64,200,000
2018	39,700,000		39,700,000		37,100,000
Prior	52,200,000		52,200,000		45,400,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	780,800,000		780,800,000		737,600,000
Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	45,000,000.0		45,000,000.0		42,600,000
2021	36,300,000		36,300,000		27,900,000
2020	20,900,000		20,900,000		15,000,000.0
2019	10,500,000		10,500,000		13,400,000
2018	7,900,000		7,900,000		5,800,000
Prior	9,800,000		9,800,000		7,600,000
Revolving Loans Amortized Cost Basis	24,600,000		24,600,000		16,900,000
Total	155,000,000.0		155,000,000.0		129,200,000
Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	189,800,000		189,800,000		139,600,000
Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022					40,200,000
2021					21,000,000.0
2020					9,700,000
2019					8,300,000
2018					2,700,000
Prior					2,000,000.0
Revolving Loans Amortized Cost Basis					118,500,000
Total					202,400,000
Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	639,100,000		639,100,000		457,800,000
2021	770,700,000		770,700,000		322,400,000
2020	556,000,000.0		556,000,000.0		241,200,000
2019	298,600,000		298,600,000		163,800,000
2018	190,900,000		190,900,000		100,700,000
Prior	619,500,000		619,500,000		356,600,000
Revolving Loans Amortized Cost Basis	17,000,000.0		17,000,000.0		14,200,000
Total	3,091,800,000		3,091,800,000		1,656,700,000
Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	267,400,000		267,400,000		129,100,000
2021	209,600,000		209,600,000		118,600,000
2020	188,800,000		188,800,000		43,900,000
2019	52,500,000		52,500,000		15,400,000
2018	35,700,000		35,700,000		36,000,000.0
Prior	117,800,000		117,800,000		76,700,000
Revolving Loans Amortized Cost Basis	1,500,000		1,500,000		1,500,000
Total	873,300,000		873,300,000		421,200,000
Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	434,300,000		434,300,000		396,300,000
2021	421,800,000		421,800,000		179,900,000
2020	238,900,000		238,900,000		96,900,000
2019	145,100,000		145,100,000		76,900,000
2018	135,200,000		135,200,000		50,700,000
Prior	186,500,000		186,500,000		97,700,000
Revolving Loans Amortized Cost Basis	778,600,000		778,600,000		234,300,000
Total	2,340,400,000		2,340,400,000		1,132,700,000
Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	156,200,000		156,200,000		96,200,000
2021	141,800,000		141,800,000		56,400,000
2020	74,000,000.0		74,000,000.0		28,600,000
2019	31,900,000		31,900,000		24,200,000
2018	33,400,000		33,400,000		15,600,000
Prior	44,700,000		44,700,000		34,100,000
Revolving Loans Amortized Cost Basis	30,000,000.0		30,000,000.0		14,500,000
Total	512,000,000.0		512,000,000.0		269,600,000
Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	132,200,000		132,200,000
2021	81,400,000		81,400,000
2020	40,600,000		40,600,000
2019	14,900,000		14,900,000
2018	14,800,000		14,800,000
Prior	2,600,000		2,600,000
Revolving Loans Amortized Cost Basis	369,800,000		369,800,000
Total	656,300,000		656,300,000
Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	195,300,000		195,300,000		360,900,000
2021	466,500,000		466,500,000		477,300,000
2020	550,600,000		550,600,000		74,700,000
2019	102,800,000		102,800,000		27,500,000
2018	33,000,000.0		33,000,000.0		25,900,000
Prior	233,600,000		233,600,000		177,300,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,581,800,000		1,581,800,000		1,143,600,000
Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	15,400,000		15,400,000		11,400,000
2021	9,000,000.0		9,000,000.0		7,000,000.0
2020	5,500,000		5,500,000		4,000,000.0
2019	4,500,000		4,500,000		4,800,000
2018	5,800,000		5,800,000		4,200,000
Prior	18,800,000		18,800,000		12,500,000
Revolving Loans Amortized Cost Basis	486,900,000		486,900,000		350,700,000
Total	545,900,000		545,900,000		394,600,000
Pass | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	784,900,000		784,900,000		507,900,000
2021	784,800,000		784,800,000		452,200,000
2020	666,700,000		666,700,000		237,900,000
2019	463,900,000		463,900,000		150,400,000
2018	279,400,000		279,400,000		76,300,000
Prior	913,300,000		913,300,000		409,000,000.0
Revolving Loans Amortized Cost Basis	27,500,000		27,500,000		15,300,000
Total	3,920,500,000		3,920,500,000		1,849,000,000
Pass | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	122,700,000		122,700,000		113,000,000.0
2021	141,000,000.0		141,000,000.0		41,500,000
2020	31,700,000		31,700,000		34,200,000
2019	25,600,000		25,600,000		14,800,000
2018	12,400,000		12,400,000		19,800,000
Prior	30,100,000		30,100,000		20,800,000
Revolving Loans Amortized Cost Basis	17,700,000		17,700,000		1,200,000
Total	381,200,000		381,200,000		245,300,000
Pass | Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	104,200,000		104,200,000		112,400,000
2021	133,900,000		133,900,000		7,000,000.0
2020	400,000		400,000		13,700,000
2019	9,200,000		9,200,000		900,000
2018	400,000		400,000		0
Prior	5,500,000		5,500,000		0
Revolving Loans Amortized Cost Basis	247,000,000.0		247,000,000.0		127,200,000
Total	500,600,000		500,600,000		261,200,000
Pass | Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	358,100,000		358,100,000		209,700,000
2021	469,000,000.0		469,000,000.0		141,400,000
2020	180,900,000		180,900,000		118,800,000
2019	76,200,000		76,200,000		27,600,000
2018	500,000		500,000		0
Prior	0		0		500,000
Revolving Loans Amortized Cost Basis	15,600,000		15,600,000		0
Total	1,100,300,000		1,100,300,000		498,000,000.0
Pass | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	162,500,000		162,500,000		58,300,000
2021	175,600,000		175,600,000		36,900,000
2020	119,500,000		119,500,000		35,100,000
2019	67,300,000		67,300,000		22,600,000
2018	48,000,000.0		48,000,000.0		11,800,000
Prior	111,900,000		111,900,000		28,100,000
Revolving Loans Amortized Cost Basis	28,700,000		28,700,000		4,900,000
Total	713,500,000		713,500,000		197,700,000
Pass | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022					35,100,000
2021					16,200,000
2020					9,000,000.0
2019					5,400,000
2018					2,100,000
Prior					1,600,000
Revolving Loans Amortized Cost Basis					108,900,000
Total					178,300,000
Pass | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	621,400,000		621,400,000		452,700,000
2021	757,400,000		757,400,000		314,900,000
2020	552,200,000		552,200,000		235,000,000.0
2019	282,900,000		282,900,000		151,000,000.0
2018	177,400,000		177,400,000		94,500,000
Prior	589,900,000		589,900,000		322,500,000
Revolving Loans Amortized Cost Basis	16,300,000		16,300,000		14,200,000
Total	2,997,500,000		2,997,500,000		1,584,800,000
Pass | Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	267,400,000		267,400,000		129,100,000
2021	209,600,000		209,600,000		118,600,000
2020	188,800,000		188,800,000		43,900,000
2019	52,500,000		52,500,000		15,400,000
2018	35,700,000		35,700,000		36,000,000.0
Prior	115,700,000		115,700,000		76,700,000
Revolving Loans Amortized Cost Basis	1,500,000		1,500,000		1,500,000
Total	871,200,000		871,200,000		421,200,000
Pass | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	415,900,000		415,900,000		394,200,000
2021	406,300,000		406,300,000		165,700,000
2020	233,400,000		233,400,000		94,500,000
2019	138,500,000		138,500,000		73,500,000
2018	130,300,000		130,300,000		47,100,000
Prior	178,900,000		178,900,000		91,300,000
Revolving Loans Amortized Cost Basis	707,500,000		707,500,000		224,700,000
Total	2,210,800,000		2,210,800,000		1,091,000,000
Pass | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	155,800,000		155,800,000		94,900,000
2021	140,400,000		140,400,000		55,000,000.0
2020	71,600,000		71,600,000		27,800,000
2019	31,400,000		31,400,000		23,100,000
2018	31,000,000.0		31,000,000.0		15,300,000
Prior	43,200,000		43,200,000		32,200,000
Revolving Loans Amortized Cost Basis	29,900,000		29,900,000		14,400,000
Total	503,300,000		503,300,000		262,700,000
Pass | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	107,600,000		107,600,000
2021	70,900,000		70,900,000
2020	35,000,000.0		35,000,000.0
2019	12,800,000		12,800,000
2018	9,900,000		9,900,000
Prior	1,500,000		1,500,000
Revolving Loans Amortized Cost Basis	356,300,000		356,300,000
Total	594,000,000.0		594,000,000.0
Other Assets Especially Mentioned | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	6,000,000.0		6,000,000.0		200,000
2021	4,400,000		4,400,000		3,100,000
2020	400,000		400,000		2,100,000
2019	4,700,000		4,700,000		0
2018	8,300,000		8,300,000		0
Prior	19,800,000		19,800,000		3,600,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	43,600,000		43,600,000		9,000,000.0
Other Assets Especially Mentioned | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	6,700,000		6,700,000		0
2021	0		0		100,000
2020	0		0		0
2019	0		0		0
2018	200,000		200,000		100,000
Prior	300,000		300,000		300,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	7,200,000		7,200,000		500,000
Other Assets Especially Mentioned | Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	2,100,000		2,100,000
2021	0		0
2020	23,100,000		23,100,000
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	25,200,000		25,200,000
Other Assets Especially Mentioned | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	2,000,000.0		2,000,000.0		100,000
2021	2,800,000		2,800,000		1,300,000
2020	2,300,000		2,300,000		1,200,000
2019	2,300,000		2,300,000		100,000
2018	9,600,000		9,600,000		100,000
Prior	3,300,000		3,300,000		900,000
Revolving Loans Amortized Cost Basis	11,200,000		11,200,000		900,000
Total	33,500,000		33,500,000		4,600,000
Other Assets Especially Mentioned | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022					200,000
2021					4,100,000
2020					100,000
2019					400,000
2018					600,000
Prior					300,000
Revolving Loans Amortized Cost Basis					7,000,000.0
Total					12,700,000
Other Assets Especially Mentioned | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	5,200,000		5,200,000		1,300,000
2021	8,800,000		8,800,000		3,200,000
2020	1,500,000		1,500,000		1,500,000
2019	11,100,000		11,100,000		7,400,000
2018	2,800,000		2,800,000		3,500,000
Prior	9,800,000		9,800,000		13,800,000
Revolving Loans Amortized Cost Basis	300,000		300,000		0
Total	39,500,000		39,500,000		30,700,000
Other Assets Especially Mentioned | Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	0		0
2020	0		0
2019	0		0
2018	0		0
Prior	1,800,000		1,800,000
Revolving Loans Amortized Cost Basis	0		0
Total	1,800,000		1,800,000
Other Assets Especially Mentioned | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	10,100,000		10,100,000		800,000
2021	9,600,000		9,600,000		11,400,000
2020	2,100,000		2,100,000		800,000
2019	3,900,000		3,900,000		800,000
2018	1,400,000		1,400,000		3,000,000.0
Prior	5,200,000		5,200,000		2,300,000
Revolving Loans Amortized Cost Basis	64,500,000		64,500,000		7,000,000.0
Total	96,800,000		96,800,000		26,100,000
Other Assets Especially Mentioned | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	200,000		200,000		0
2021	1,100,000		1,100,000		200,000
2020	2,300,000		2,300,000		200,000
2019	200,000		200,000		500,000
2018	1,500,000		1,500,000		100,000
Prior	300,000		300,000		600,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	5,600,000		5,600,000		1,600,000
Other Assets Especially Mentioned | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	1,500,000		1,500,000
2021	3,400,000		3,400,000
2020	600,000		600,000
2019	1,200,000		1,200,000
2018	700,000		700,000
Prior	0		0
Revolving Loans Amortized Cost Basis	12,100,000		12,100,000
Total	19,500,000		19,500,000
Substandard | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	3,500,000		3,500,000		3,900,000
2021	33,200,000		33,200,000		15,300,000
2020	10,700,000		10,700,000		2,300,000
2019	18,900,000		18,900,000		700,000
2018	20,100,000		20,100,000		1,000,000.0
Prior	9,500,000		9,500,000		12,400,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	95,900,000		95,900,000		35,600,000
Substandard | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0		800,000
2021	800,000		800,000		200,000
2020	200,000		200,000		0
2019	0		0		600,000
2018	0		0		300,000
Prior	600,000		600,000		100,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,600,000		1,600,000		2,000,000.0
Substandard | Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0		0
2021	400,000		400,000		400,000
2020	0		0		0
2019	0		0		0
2018	0		0		400,000
Prior	400,000		400,000		0
Revolving Loans Amortized Cost Basis	0		0		0
Total	800,000		800,000		800,000
Substandard | Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	2,900,000		2,900,000
2021	0		0
2020	0		0
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	2,900,000		2,900,000
Substandard | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	1,100,000		1,100,000		4,000,000.0
2021	13,900,000		13,900,000		400,000
2020	3,600,000		3,600,000		1,000,000.0
2019	3,400,000		3,400,000		600,000
2018	3,200,000		3,200,000		1,300,000
Prior	14,200,000		14,200,000		4,300,000
Revolving Loans Amortized Cost Basis	11,400,000		11,400,000		0
Total	50,800,000		50,800,000		11,600,000
Substandard | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022					4,900,000
2021					700,000
2020					600,000
2019					2,500,000
2018					0
Prior					100,000
Revolving Loans Amortized Cost Basis					2,600,000
Total					11,400,000
Substandard | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	12,100,000		12,100,000		3,800,000
2021	3,000,000.0		3,000,000.0		4,300,000
2020	2,300,000		2,300,000		4,700,000
2019	4,600,000		4,600,000		5,400,000
2018	2,800,000		2,800,000		2,700,000
Prior	17,800,000		17,800,000		20,300,000
Revolving Loans Amortized Cost Basis	400,000		400,000		0
Total	43,000,000.0		43,000,000.0		41,200,000
Substandard | Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	0		0
2020	0		0
2019	0		0
2018	0		0
Prior	300,000		300,000
Revolving Loans Amortized Cost Basis	0		0
Total	300,000		300,000
Substandard | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	8,000,000.0		8,000,000.0		1,300,000
2021	1,200,000		1,200,000		2,800,000
2020	3,400,000		3,400,000		1,600,000
2019	2,700,000		2,700,000		2,600,000
2018	3,500,000		3,500,000		600,000
Prior	2,400,000		2,400,000		4,100,000
Revolving Loans Amortized Cost Basis	6,600,000		6,600,000		2,600,000
Total	27,800,000		27,800,000		15,600,000
Substandard | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	200,000		200,000		1,300,000
2021	300,000		300,000		1,200,000
2020	100,000		100,000		600,000
2019	300,000		300,000		600,000
2018	900,000		900,000		200,000
Prior	1,200,000		1,200,000		1,300,000
Revolving Loans Amortized Cost Basis	100,000		100,000		100,000
Total	3,100,000		3,100,000		5,300,000
Substandard | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	23,100,000		23,100,000
2021	6,500,000		6,500,000
2020	5,000,000.0		5,000,000.0
2019	900,000		900,000
2018	4,200,000		4,200,000
Prior	1,100,000		1,100,000
Revolving Loans Amortized Cost Basis	1,400,000		1,400,000
Total	42,200,000		42,200,000
Doubtful | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	0		0
2020	0		0
2019	0		0
2018	1,800,000		1,800,000
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	1,800,000		1,800,000
Doubtful | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	3,200,000		3,200,000
2020	0		0
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	3,200,000		3,200,000
Doubtful | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	0		0
2020	3,100,000		3,100,000
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	3,100,000		3,100,000
Doubtful | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	400,000		400,000
2021	1,500,000		1,500,000
2020	0		0
2019	0		0
2018	7,900,000		7,900,000
Prior	2,000,000.0		2,000,000.0
Revolving Loans Amortized Cost Basis	0		0
Total	11,800,000		11,800,000
Doubtful | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	300,000		300,000
2021	4,700,000		4,700,000
2020	0		0
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	5,000,000.0		5,000,000.0
Doubtful | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0
2021	600,000		600,000
2020	0		0
2019	0		0
2018	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	600,000		600,000
Performing | Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	279,000,000.0		279,000,000.0		272,600,000
2021	194,900,000		194,900,000		208,600,000
2020	144,500,000		144,500,000		108,300,000
2019	69,000,000.0		69,000,000.0		64,000,000.0
2018	39,500,000		39,500,000		37,000,000.0
Prior	51,700,000		51,700,000		45,000,000.0
Revolving Loans Amortized Cost Basis	0		0		0
Total	778,600,000		778,600,000		735,500,000
Performing | Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	45,000,000.0		45,000,000.0		42,500,000
2021	36,200,000		36,200,000		27,900,000
2020	20,900,000		20,900,000		15,000,000.0
2019	10,500,000		10,500,000		13,300,000
2018	7,900,000		7,900,000		5,800,000
Prior	9,700,000		9,700,000		7,600,000
Revolving Loans Amortized Cost Basis	24,600,000		24,600,000		16,900,000
Total	154,800,000		154,800,000		129,000,000.0
Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	189,000,000.0		189,000,000.0		139,000,000.0
Performing | Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	195,300,000		195,300,000		360,900,000
2021	466,300,000		466,300,000		477,000,000.0
2020	550,200,000		550,200,000		74,700,000
2019	102,300,000		102,300,000		27,500,000
2018	32,600,000		32,600,000		25,700,000
Prior	230,200,000		230,200,000		176,500,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	1,576,900,000		1,576,900,000		1,142,300,000
Performing | Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	14,900,000		14,900,000		11,100,000
2021	8,700,000		8,700,000		7,000,000.0
2020	5,400,000		5,400,000		3,700,000
2019	4,400,000		4,400,000		4,800,000
2018	5,700,000		5,700,000		3,600,000
Prior	17,600,000		17,600,000		12,000,000.0
Revolving Loans Amortized Cost Basis	486,500,000		486,500,000		350,700,000
Total	543,200,000		543,200,000		392,900,000
Nonperforming | Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	200,000		200,000		500,000
2021	600,000		600,000		500,000
2020	400,000		400,000		400,000
2019	300,000		300,000		200,000
2018	200,000		200,000		100,000
Prior	500,000		500,000		400,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	2,200,000		2,200,000		2,100,000
Nonperforming | Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0		100,000
2021	100,000		100,000		0
2020	0		0		0
2019	0		0		100,000
2018	0		0		0
Prior	100,000		100,000		0
Revolving Loans Amortized Cost Basis	0		0		0
Total	200,000		200,000		200,000
Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	800,000		800,000		600,000
Nonperforming | Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0		0
2021	200,000		200,000		300,000
2020	400,000		400,000		0
2019	500,000		500,000		0
2018	400,000		400,000		200,000
Prior	3,400,000		3,400,000		800,000
Revolving Loans Amortized Cost Basis	0		0		0
Total	4,900,000		4,900,000		1,300,000
Nonperforming | Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	500,000		500,000		300,000
2021	300,000		300,000		0
2020	100,000		100,000		300,000
2019	100,000		100,000		0
2018	100,000		100,000		600,000
Prior	1,200,000		1,200,000		500,000
Revolving Loans Amortized Cost Basis	400,000		400,000		0
Total	2,700,000		2,700,000		1,700,000
Agriculture Portfolio Segment [Member] | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	1,900,000		1,900,000		1,500,000
Agriculture Portfolio Segment [Member] | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	1,900,000		1,900,000		1,500,000
Agriculture Portfolio Segment [Member] | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	0		0		0
Commercial | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	113,700,000		113,700,000		73,200,000
Commercial | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	113,300,000		113,300,000		73,100,000
Commercial | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	400,000		400,000		100,000
Total consumer loans | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	74,200,000		74,200,000		64,900,000
Total consumer loans | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	73,800,000		73,800,000		64,400,000
Total consumer loans | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2022	$ 400,000		$ 400,000		$ 500,000