Loans Held for Investment - Schedule of Recorded Investment in Criticized Loans by Class and Credit Quality Indicator (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Impaired financing receivable, recorded investment	$ 67,400,000		$ 67,400,000
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]
2020	272,100,000		272,100,000
2019	489,200,000		489,200,000
2018	287,400,000		287,400,000
2017	166,900,000		166,900,000
2016	94,200,000		94,200,000
Prior	457,000,000.0		457,000,000.0
Revolving Loans Amortized Cost Basis	10,000,000.0		10,000,000.0
Total	1,776,800,000		1,776,800,000
Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	3,753,400,000		3,753,400,000		$ 3,743,200,000
Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	59,900,000		59,900,000
2019	85,100,000		85,100,000
2018	46,400,000		46,400,000
2017	19,900,000		19,900,000
2016	23,300,000		23,300,000
Prior	26,200,000		26,200,000
Revolving Loans Amortized Cost Basis	300,000		300,000
Total	261,100,000		261,100,000
Loans held for investment	261,100,000		261,100,000		265,000,000.0
Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	76,600,000		76,600,000
2019	36,900,000		36,900,000
2018	46,600,000		46,600,000
2017	1,000,000.0		1,000,000.0
2016	2,400,000		2,400,000
Prior	100,000		100,000
Revolving Loans Amortized Cost Basis	99,900,000		99,900,000
Total	263,500,000		263,500,000
Loans held for investment	263,500,000		263,500,000		250,900,000
Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	134,700,000		134,700,000
2019	270,100,000		270,100,000
2018	174,900,000		174,900,000
2017	27,700,000		27,700,000
2016	10,900,000		10,900,000
Prior	5,800,000		5,800,000
Revolving Loans Amortized Cost Basis	7,900,000		7,900,000
Total	632,000,000.0		632,000,000.0
Loans held for investment	632,000,000.0		632,000,000.0		523,500,000
Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	1,577,700,000		1,577,700,000		1,396,300,000
Total construction loans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	1,156,600,000		1,156,600,000		1,039,400,000
Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	41,400,000		41,400,000
2019	46,000,000.0		46,000,000.0
2018	47,900,000		47,900,000
2017	28,700,000		28,700,000
2016	15,400,000		15,400,000
Prior	39,700,000		39,700,000
Revolving Loans Amortized Cost Basis	4,400,000		4,400,000
Total	223,500,000		223,500,000
Loans held for investment	223,500,000		223,500,000		220,600,000
Total real estate loans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	6,711,200,000		6,711,200,000		6,399,500,000
Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	156,000,000.0		156,000,000.0
2019	269,400,000		269,400,000
2018	144,900,000		144,900,000
2017	87,600,000		87,600,000
2016	52,400,000		52,400,000
Prior	63,400,000		63,400,000
Revolving Loans Amortized Cost Basis	0		0
Total	773,700,000		773,700,000
Loans held for investment	773,700,000		773,700,000		805,100,000
Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	23,100,000		23,100,000
2019	36,100,000		36,100,000
2018	21,200,000		21,200,000
2017	19,700,000		19,700,000
2016	8,200,000		8,200,000
Prior	10,300,000		10,300,000
Revolving Loans Amortized Cost Basis	16,200,000		16,200,000
Total	134,800,000		134,800,000
Loans held for investment	134,800,000		134,800,000		150,600,000
Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	137.2		137.2
Loans held for investment	64,400,000		64,400,000		70,200,000
Total consumer loans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	972,900,000		972,900,000		1,025,900,000
Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	1,959,400,000		1,959,400,000		2,153,900,000
Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
Loans held for investment	217,700,000		217,700,000		$ 247,600,000
Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	197,300,000		197,300,000
2019	356,700,000		356,700,000
2018	277,200,000		277,200,000
2017	192,300,000		192,300,000
2016	117,400,000		117,400,000
Prior	461,500,000		461,500,000
Revolving Loans Amortized Cost Basis	8,300,000		8,300,000
Total	1,610,700,000		1,610,700,000
Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	43,700,000		43,700,000
2019	116,400,000		116,400,000
2018	51,100,000		51,100,000
2017	22,200,000		22,200,000
2016	37,800,000		37,800,000
Prior	93,500,000		93,500,000
Revolving Loans Amortized Cost Basis	1,200,000		1,200,000
Total	365,900,000		365,900,000
Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	735,400,000		735,400,000
2019	221,100,000		221,100,000
2018	125,600,000		125,600,000
2017	103,900,000		103,900,000
2016	63,500,000		63,500,000
Prior	118,500,000		118,500,000
Revolving Loans Amortized Cost Basis	258,900,000		258,900,000
Total	1,626,900,000		1,626,900,000
Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	35,800,000		35,800,000
2019	69,800,000		69,800,000
2018	48,200,000		48,200,000
2017	29,400,000		29,400,000
2016	18,500,000		18,500,000
Prior	43,500,000		43,500,000
Revolving Loans Amortized Cost Basis	16,100,000		16,100,000
Total	261,300,000		261,300,000
Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	34,300,000		34,300,000
2019	33,200,000		33,200,000
2018	13,600,000		13,600,000
2017	11,100,000		11,100,000
2016	4,000,000.0		4,000,000.0
Prior	2,800,000		2,800,000
Revolving Loans Amortized Cost Basis	117,100,000		117,100,000
Total	216,100,000		216,100,000
Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	305,900,000		305,900,000
2019	492,500,000		492,500,000
2018	88,200,000		88,200,000
2017	39,400,000		39,400,000
2016	35,700,000		35,700,000
Prior	233,700,000		233,700,000
Revolving Loans Amortized Cost Basis	0		0
Total	1,195,400,000		1,195,400,000
Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	6,900,000		6,900,000
2019	9,200,000		9,200,000
2018	6,000,000.0		6,000,000.0
2017	5,700,000		5,700,000
2016	5,600,000		5,600,000
Prior	16,000,000.0		16,000,000.0
Revolving Loans Amortized Cost Basis	332,900,000		332,900,000
Total	382,300,000		382,300,000
Pass | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	268,200,000		268,200,000
2019	471,800,000		471,800,000
2018	282,700,000		282,700,000
2017	165,200,000		165,200,000
2016	93,100,000		93,100,000
Prior	426,400,000		426,400,000
Revolving Loans Amortized Cost Basis	10,000,000.0		10,000,000.0
Total	1,717,400,000		1,717,400,000
Pass | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	58,300,000		58,300,000
2019	84,700,000		84,700,000
2018	46,400,000		46,400,000
2017	19,100,000		19,100,000
2016	23,100,000		23,100,000
Prior	26,000,000.0		26,000,000.0
Revolving Loans Amortized Cost Basis	200,000		200,000
Total	257,800,000		257,800,000
Pass | Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	76,400,000		76,400,000
2019	36,900,000		36,900,000
2018	46,600,000		46,600,000
2017	1,000,000.0		1,000,000.0
2016	2,400,000		2,400,000
Prior	100,000		100,000
Revolving Loans Amortized Cost Basis	99,900,000		99,900,000
Total	263,300,000		263,300,000
Pass | Commercial
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	134,700,000		134,700,000
2019	270,100,000		270,100,000
2018	174,900,000		174,900,000
2017	27,700,000		27,700,000
2016	10,900,000		10,900,000
Prior	5,800,000		5,800,000
Revolving Loans Amortized Cost Basis	7,900,000		7,900,000
Total	632,000,000.0		632,000,000.0
Pass | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	38,800,000		38,800,000
2019	42,500,000		42,500,000
2018	38,800,000		38,800,000
2017	25,400,000		25,400,000
2016	13,900,000		13,900,000
Prior	32,600,000		32,600,000
Revolving Loans Amortized Cost Basis	3,400,000		3,400,000
Total	195,400,000		195,400,000
Pass | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	194,400,000		194,400,000
2019	345,800,000		345,800,000
2018	268,100,000		268,100,000
2017	177,500,000		177,500,000
2016	111,200,000		111,200,000
Prior	412,000,000.0		412,000,000.0
Revolving Loans Amortized Cost Basis	8,200,000		8,200,000
Total	1,517,200,000		1,517,200,000
Pass | Multi-family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	43,700,000		43,700,000
2019	116,400,000		116,400,000
2018	51,100,000		51,100,000
2017	22,200,000		22,200,000
2016	37,800,000		37,800,000
Prior	93,500,000		93,500,000
Revolving Loans Amortized Cost Basis	1,200,000		1,200,000
Total	365,900,000		365,900,000
Pass | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	733,300,000		733,300,000
2019	202,500,000		202,500,000
2018	123,000,000.0		123,000,000.0
2017	99,500,000		99,500,000
2016	57,400,000		57,400,000
Prior	109,700,000		109,700,000
Revolving Loans Amortized Cost Basis	253,300,000		253,300,000
Total	1,578,700,000		1,578,700,000
Pass | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	34,400,000		34,400,000
2019	68,100,000		68,100,000
2018	46,800,000		46,800,000
2017	27,400,000		27,400,000
2016	18,100,000		18,100,000
Prior	40,700,000		40,700,000
Revolving Loans Amortized Cost Basis	15,600,000		15,600,000
Total	251,100,000		251,100,000
Pass | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	24,700,000		24,700,000
2019	31,500,000		31,500,000
2018	11,500,000		11,500,000
2017	8,300,000		8,300,000
2016	3,900,000		3,900,000
Prior	2,300,000		2,300,000
Revolving Loans Amortized Cost Basis	112,500,000		112,500,000
Total	194,700,000		194,700,000
Other Assets Especially Mentioned | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	1,800,000		1,800,000
2018	2,300,000		2,300,000
2017	700,000		700,000
2016	0		0
Prior	17,400,000		17,400,000
Revolving Loans Amortized Cost Basis	0		0
Total	22,200,000		22,200,000
Other Assets Especially Mentioned | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1,000,000.0		1,000,000.0
2019	200,000		200,000
2018	0		0
2017	0		0
2016	100,000		100,000
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	1,300,000		1,300,000
Other Assets Especially Mentioned | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	100,000		100,000
2019	2,100,000		2,100,000
2018	6,400,000		6,400,000
2017	600,000		600,000
2016	200,000		200,000
Prior	2,000,000.0		2,000,000.0
Revolving Loans Amortized Cost Basis	1,000,000.0		1,000,000.0
Total	12,400,000		12,400,000
Other Assets Especially Mentioned | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1,400,000		1,400,000
2019	5,800,000		5,800,000
2018	2,400,000		2,400,000
2017	4,000,000.0		4,000,000.0
2016	3,200,000		3,200,000
Prior	25,900,000		25,900,000
Revolving Loans Amortized Cost Basis	0		0
Total	42,700,000		42,700,000
Other Assets Especially Mentioned | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	500,000		500,000
2019	14,900,000		14,900,000
2018	1,200,000		1,200,000
2017	2,400,000		2,400,000
2016	5,500,000		5,500,000
Prior	3,600,000		3,600,000
Revolving Loans Amortized Cost Basis	4,500,000		4,500,000
Total	32,600,000		32,600,000
Other Assets Especially Mentioned | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	200,000		200,000
2018	400,000		400,000
2017	600,000		600,000
2016	100,000		100,000
Prior	1,000,000.0		1,000,000.0
Revolving Loans Amortized Cost Basis	400,000		400,000
Total	2,700,000		2,700,000
Other Assets Especially Mentioned | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	9,000,000.0		9,000,000.0
2019	600,000		600,000
2018	500,000		500,000
2017	300,000		300,000
2016	0		0
Prior	300,000		300,000
Revolving Loans Amortized Cost Basis	2,400,000		2,400,000
Total	13,100,000		13,100,000
Substandard | Non-owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	3,900,000		3,900,000
2019	15,600,000		15,600,000
2018	2,400,000		2,400,000
2017	1,000,000.0		1,000,000.0
2016	1,100,000		1,100,000
Prior	13,200,000		13,200,000
Revolving Loans Amortized Cost Basis	0		0
Total	37,200,000		37,200,000
Substandard | Land acquisition & development
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	600,000		600,000
2019	200,000		200,000
2018	0		0
2017	800,000		800,000
2016	100,000		100,000
Prior	200,000		200,000
Revolving Loans Amortized Cost Basis	100,000		100,000
Total	2,000,000.0		2,000,000.0
Substandard | Residential
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	200,000		200,000
2019	0		0
2018	0		0
2017	0		0
2016	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	200,000		200,000
Substandard | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	100,000		100,000
2019	1,400,000		1,400,000
2018	2,700,000		2,700,000
2017	2,700,000		2,700,000
2016	1,300,000		1,300,000
Prior	5,100,000		5,100,000
Revolving Loans Amortized Cost Basis	0		0
Total	13,300,000		13,300,000
Substandard | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1,500,000		1,500,000
2019	5,100,000		5,100,000
2018	6,700,000		6,700,000
2017	10,800,000		10,800,000
2016	2,900,000		2,900,000
Prior	23,600,000		23,600,000
Revolving Loans Amortized Cost Basis	100,000		100,000
Total	50,700,000		50,700,000
Substandard | Commercial and floor plans
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1,600,000		1,600,000
2019	3,700,000		3,700,000
2018	1,400,000		1,400,000
2017	2,000,000.0		2,000,000.0
2016	600,000		600,000
Prior	5,200,000		5,200,000
Revolving Loans Amortized Cost Basis	1,100,000		1,100,000
Total	15,600,000		15,600,000
Substandard | Commercial purpose secured by 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1,400,000		1,400,000
2019	1,500,000		1,500,000
2018	1,000,000.0		1,000,000.0
2017	1,400,000		1,400,000
2016	300,000		300,000
Prior	1,800,000		1,800,000
Revolving Loans Amortized Cost Basis	100,000		100,000
Total	7,500,000		7,500,000
Substandard | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	600,000		600,000
2019	600,000		600,000
2018	1,600,000		1,600,000
2017	2,500,000		2,500,000
2016	100,000		100,000
Prior	200,000		200,000
Revolving Loans Amortized Cost Basis	2,200,000		2,200,000
Total	7,800,000		7,800,000
Doubtful | Agricultural
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	2,400,000		2,400,000
2019	0		0
2018	0		0
2017	0		0
2016	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	2,400,000		2,400,000
Doubtful | Owner occupied
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	0		0
2018	0		0
2017	0		0
2016	100,000		100,000
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	100,000		100,000
Doubtful | Agriculture Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	500,000		500,000
2018	0		0
2017	0		0
2016	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Total	500,000		500,000
Performing | Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	155,900,000		155,900,000
2019	269,000,000.0		269,000,000.0
2018	144,400,000		144,400,000
2017	87,300,000		87,300,000
2016	52,200,000		52,200,000
Prior	62,900,000		62,900,000
Revolving Loans Amortized Cost Basis	0		0
Total	771,700,000		771,700,000
Performing | Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	23,100,000		23,100,000
2019	36,100,000		36,100,000
2018	21,100,000		21,100,000
2017	19,600,000		19,600,000
2016	8,200,000		8,200,000
Prior	10,200,000		10,200,000
Revolving Loans Amortized Cost Basis	16,200,000		16,200,000
Total	134,500,000		134,500,000
Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	136.8		136.8
Performing | Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	305,900,000		305,900,000
2019	492,200,000		492,200,000
2018	87,800,000		87,800,000
2017	39,400,000		39,400,000
2016	35,500,000		35,500,000
Prior	232,300,000		232,300,000
Revolving Loans Amortized Cost Basis	0		0
Total	1,193,100,000		1,193,100,000
Performing | Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	6,900,000		6,900,000
2019	9,200,000		9,200,000
2018	5,700,000		5,700,000
2017	5,600,000		5,600,000
2016	4,900,000		4,900,000
Prior	15,100,000		15,100,000
Revolving Loans Amortized Cost Basis	332,800,000		332,800,000
Total	380,200,000		380,200,000
Nonperforming | Indirect consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	100,000		100,000
2019	400,000		400,000
2018	500,000		500,000
2017	300,000		300,000
2016	200,000		200,000
Prior	500,000		500,000
Revolving Loans Amortized Cost Basis	0		0
Total	2,000,000.0		2,000,000.0
Nonperforming | Direct consumer
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	0		0
2018	100,000		100,000
2017	100,000		100,000
2016	0		0
Prior	100,000		100,000
Revolving Loans Amortized Cost Basis	0		0
Total	300,000		300,000
Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0.4		0.4
Nonperforming | Residential 1-4 family
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	300,000		300,000
2018	400,000		400,000
2017	0		0
2016	200,000		200,000
Prior	1,400,000		1,400,000
Revolving Loans Amortized Cost Basis	0		0
Total	2,300,000		2,300,000
Nonperforming | Consumer Home Equity and HELOC
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
2019	0		0
2018	300,000		300,000
2017	100,000		100,000
2016	700,000		700,000
Prior	900,000		900,000
Revolving Loans Amortized Cost Basis	100,000		100,000
Total	2,100,000		2,100,000
Agriculture Portfolio Segment [Member] | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1.6		1.6
Agriculture Portfolio Segment [Member] | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	1.6		1.6
Agriculture Portfolio Segment [Member] | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0		0
Commercial | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	71.2		71.2
Commercial | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	71.1		71.1
Commercial | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	0.1		0.1
Total consumer loans | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	64.4		64.4
Total consumer loans | Performing | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	64.1		64.1
Total consumer loans | Nonperforming | Credit card
Loans and Leases Receivable Recorded Investment, Criticized Loans [Line Items]
2020	$ 0.3		$ 0.3