Loans Held for Investment - Schedule of Contractual Aging of Loans by Portfolio (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	$ 39,800,000
Loans and Leases Receivable, Nonperforming, Accrual of Interest	0
Impaired Financing Receivable, Interest Income, Accrual Method	0
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	19,600,000	$ 8,000,000.0
Loans and Leases Receivable, Collateral for Secured Borrowings	8,528,600,000	3,971,500,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	5,600,000	1,100,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	800,000	1,000,000.0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,100,000	600,000
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	7,500,000	2,700,000
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	8,501,500,000	3,960,800,000
Land Acquisition And Development Construction Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	3,700,000	700,000
Loans and Leases Receivable, Collateral for Secured Borrowings	386,200,000	247,800,000
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	159,200,000	113,800,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	117,900,000	41,800,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	29,700,000	34,200,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	17,000,000.0	15,400,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	11,100,000	20,200,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	29,100,000	21,200,000
Financing Receivable, Excluding Accrued Interest, Revolving	22,200,000	1,200,000
Land Acquisition And Development Construction Financing Receivable [Member] | Pass
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	152,500,000	113,000,000.0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	114,400,000	41,500,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	29,500,000	34,200,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	17,000,000.0	14,800,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	10,900,000	19,800,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	28,400,000	20,800,000
Financing Receivable, Excluding Accrued Interest, Revolving	22,200,000	1,200,000
Land Acquisition And Development Construction Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,800,000	200,000
Land Acquisition And Development Construction Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Land Acquisition And Development Construction Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	0
Land Acquisition And Development Construction Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,400,000	200,000
Land Acquisition And Development Construction Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	380,100,000	246,900,000
Residential Real Estate Construction Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	0	0
Loans and Leases Receivable, Collateral for Secured Borrowings	516,200,000	262,000,000.0
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	118,400,000	112,400,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	120,400,000	7,400,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	400,000	13,700,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	300,000	900,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	400,000	400,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	6,200,000	0
Financing Receivable, Excluding Accrued Interest, Revolving	270,100,000	127,200,000
Residential Real Estate Construction Financing Receivable [Member] | Pass
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	118,400,000	112,400,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	119,900,000	7,000,000.0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	400,000	13,700,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	300,000	900,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	400,000	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	5,800,000	0
Financing Receivable, Excluding Accrued Interest, Revolving	270,100,000	127,200,000
Residential Real Estate Construction Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,100,000	4,200,000
Residential Real Estate Construction Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Residential Real Estate Construction Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Residential Real Estate Construction Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,100,000	4,200,000
Residential Real Estate Construction Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	515,100,000	257,800,000
Commercial Real Estate Construction [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	0	0
Loans and Leases Receivable, Collateral for Secured Borrowings	1,042,000,000	498,000,000.0
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	461,800,000	209,700,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	399,200,000	141,400,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	112,800,000	118,800,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	45,900,000	27,600,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	400,000	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	500,000
Financing Receivable, Excluding Accrued Interest, Revolving	21,900,000	0
Commercial Real Estate Construction [Member] | Pass
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	442,700,000	209,700,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	374,800,000	141,400,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	89,700,000	118,800,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	45,900,000	27,600,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	400,000	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	0	500,000
Financing Receivable, Excluding Accrued Interest, Revolving	10,600,000	0
Commercial Real Estate Construction [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	7,500,000	0
Commercial Real Estate Construction [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	0
Commercial Real Estate Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Commercial Real Estate Construction [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	8,100,000	0
Commercial Real Estate Construction [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,033,900,000	498,000,000.0
Real Estate Construction Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	3,700,000	700,000
Loans and Leases Receivable, Collateral for Secured Borrowings	1,944,400,000	1,007,800,000
Real Estate Construction Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	10,400,000	4,400,000
Real Estate Construction Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	0
Real Estate Construction Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	0
Real Estate Construction Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	11,600,000	4,400,000
Real Estate Construction Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,929,100,000	1,002,700,000
Residential Mortgage [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	6,400,000	2,900,000
Loans and Leases Receivable, Collateral for Secured Borrowings	2,188,300,000	1,538,200,000
Residential Mortgage [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	9,900,000	3,000,000.0
Residential Mortgage [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,100,000	800,000
Residential Mortgage [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,200,000	100,000
Residential Mortgage [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	13,200,000	3,900,000
Residential Mortgage [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,168,700,000	1,531,400,000
Agricultural Real Estate Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	7,600,000	4,900,000
Loans and Leases Receivable, Collateral for Secured Borrowings	794,900,000	213,900,000
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	204,200,000	62,400,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	185,800,000	38,600,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	115,500,000	37,300,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	68,000,000.0	23,300,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	59,300,000	13,200,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	119,600,000	33,300,000
Financing Receivable, Excluding Accrued Interest, Revolving	42,500,000	5,800,000
Agricultural Real Estate Financing Receivable [Member] | Pass
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	180,000,000.0	58,300,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	172,800,000	36,900,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	109,500,000	35,100,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	64,800,000	22,600,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	46,600,000	11,800,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	105,100,000	28,100,000
Financing Receivable, Excluding Accrued Interest, Revolving	31,400,000	4,900,000
Agricultural Real Estate Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,100,000	1,900,000
Agricultural Real Estate Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	6,100,000	200,000
Agricultural Real Estate Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Agricultural Real Estate Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	7,200,000	2,100,000
Agricultural Real Estate Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	780,100,000	206,900,000
Real Estate Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	37,300,000	16,500,000
Loans and Leases Receivable, Collateral for Secured Borrowings	13,456,200,000	6,731,400,000
Real Estate Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	27,000,000.0	10,400,000
Real Estate Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	9,600,000	2,000,000.0
Real Estate Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,900,000	700,000
Real Estate Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	39,500,000	13,100,000
Real Estate Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	13,379,400,000	6,701,800,000
Indirect consumer
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	2,700,000	1,700,000
Loans and Leases Receivable, Collateral for Secured Borrowings	829,700,000	737,600,000
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	381,300,000	273,100,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	177,300,000	209,100,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	130,600,000	108,700,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	60,000,000.0	64,200,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	33,800,000	37,100,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	46,700,000	45,400,000
Financing Receivable, Excluding Accrued Interest, Revolving	0	0
Indirect consumer | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	9,300,000	5,100,000
Indirect consumer | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,400,000	1,400,000
Indirect consumer | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	400,000
Indirect consumer | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	12,300,000	6,900,000
Indirect consumer | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	814,700,000	729,000,000.0
Other consumer
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	300,000	100,000
Loans and Leases Receivable, Collateral for Secured Borrowings	152,900,000	129,200,000
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	52,700,000	42,600,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	32,000,000.0	27,900,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	18,300,000	15,000,000.0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	8,500,000	13,400,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	6,500,000	5,800,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	9,000,000.0	7,600,000
Financing Receivable, Excluding Accrued Interest, Revolving	25,900,000	16,900,000
Other consumer | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	800,000	500,000
Other consumer | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	300,000	200,000
Other consumer | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	100,000	100,000
Other consumer | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,200,000	800,000
Other consumer | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	151,400,000	128,300,000
Credit card consumer
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	0	0
Loans and Leases Receivable, Collateral for Secured Borrowings	75,900,000	64,900,000
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	178,100,000	139,600,000
Credit card consumer | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	800,000	600,000
Credit card consumer | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	400,000	200,000
Credit card consumer | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	600,000	500,000
Credit card consumer | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,800,000	1,300,000
Credit card consumer | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	74,100,000	63,600,000
Total consumer loans
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	3,000,000.0	1,800,000
Loans and Leases Receivable, Collateral for Secured Borrowings	1,058,500,000	931,700,000
Total consumer loans | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	10,900,000	6,200,000
Total consumer loans | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	3,100,000	1,800,000
Total consumer loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,300,000	1,000,000.0
Total consumer loans | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	15,300,000	9,000,000.0
Total consumer loans | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,040,200,000	920,900,000
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	10,200,000	5,000,000.0
Loans and Leases Receivable, Collateral for Secured Borrowings	2,882,600,000	1,475,500,000
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	7,100,000	4,900,000
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	1,700,000	700,000
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,100,000	1,100,000
Commercial Portfolio Segment [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	10,900,000	6,700,000
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,861,500,000	1,463,800,000
Agricultural Financing Receivable [Member]
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	8,700,000	1,600,000
Loans and Leases Receivable, Collateral for Secured Borrowings	708,300,000	203,900,000
Agricultural Financing Receivable [Member] | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	800,000	700,000
Agricultural Financing Receivable [Member] | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	2,200,000	0
Agricultural Financing Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	100,000	0
Agricultural Financing Receivable [Member] | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	3,100,000	700,000
Agricultural Financing Receivable [Member] | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	696,500,000	201,600,000
Other, including overdrafts
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	0	0
Loans and Leases Receivable, Collateral for Secured Borrowings	9,200,000	1,500,000
Other, including overdrafts | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Other, including overdrafts | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Other, including overdrafts | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Other, including overdrafts | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	0	0
Other, including overdrafts | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	9,200,000	1,500,000
Loans held for investment
Loans and Leases Receivable Recorded Investment, Past Due
Non-accrual Loans	59,200,000	24,900,000
Loans and Leases Receivable, Collateral for Secured Borrowings	18,114,800,000	9,344,000,000
Loans held for investment | Financing Receivables, 30 to 59 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	45,800,000	22,200,000
Loans held for investment | Financing Receivables, 60 to 89 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	16,600,000	4,500,000
Loans held for investment | Financing Receivables, Equal to Greater than 90 Days Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	6,400,000	2,800,000
Loans held for investment | Financial Asset, Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	68,800,000	29,500,000
Loans held for investment | Financial Asset, Not Past Due
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Loan in Process	17,986,800,000	9,289,600,000
Non Owner Occupied Loans
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,163,700,000	512,000,000.0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	882,000,000.0	470,600,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	674,200,000	242,300,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	490,400,000	151,100,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	261,100,000	77,300,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	907,600,000	425,000,000.0
Financing Receivable, Excluding Accrued Interest, Revolving	29,200,000	15,300,000
Non Owner Occupied Loans | Pass
Loans and Leases Receivable Recorded Investment, Past Due
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	1,162,600,000	507,900,000
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	861,300,000	452,200,000
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	661,100,000	237,900,000
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	467,600,000	150,400,000
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	241,500,000	76,300,000
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	890,400,000	409,000,000.0
Financing Receivable, Excluding Accrued Interest, Revolving	$ 29,200,000	$ 15,300,000