Fair Value Disclosures, Significant Assumptions (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Assets [Abstract]
Securities available for sale		$ 985,050	$ 518,400
Loans held for sale, carried at fair value		99,747	69,800
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Securities available for sale		0	0
Derivatives		0	0
Liabilities [Abstract]
Derivatives		0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Securities available for sale		985,050	518,400
Derivatives		19,202	5,464
Liabilities [Abstract]
Derivatives		12,690	4,402
Significant Un-observable Inputs (Level 3) [Member]
Assets [Abstract]
Securities available for sale		0	0
Derivatives		0	0
Liabilities [Abstract]
Derivatives		0	0
Recurring Basis [Member]
Assets [Abstract]
Loans held for sale, carried at fair value		99,747	69,800
Capitalized mortgage loan servicing rights		15,403	19,171
Derivatives	[1]	19,202	5,464
Liabilities [Abstract]
Derivatives	[2]	12,690	4,402
Recurring Basis [Member] | U.S. Agency [Member]
Assets [Abstract]
Securities available for sale		11,130	14,661
Recurring Basis [Member] | U.S. Agency Residential Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		335,560	227,762
Recurring Basis [Member] | U.S. Agency Commercial Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		8,421	10,756
Recurring Basis [Member] | Private Label Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		44,285	39,693
Recurring Basis [Member] | Other Asset Backed [Member]
Assets [Abstract]
Securities available for sale		263,371	93,886
Recurring Basis [Member] | Obligations of States and Political Subdivisions [Member]
Assets [Abstract]
Securities available for sale		244,978	96,102
Recurring Basis [Member] | Corporate [Member]
Assets [Abstract]
Securities available for sale		75,017	33,195
Recurring Basis [Member] | Trust Preferred [Member]
Assets [Abstract]
Securities available for sale		1,770	1,843
Recurring Basis [Member] | Foreign Government [Member]
Assets [Abstract]
Securities available for sale		518	502
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Loans held for sale, carried at fair value		0	0
Capitalized mortgage loan servicing rights		0	0
Derivatives	[1]	0	0
Liabilities [Abstract]
Derivatives	[2]	0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Agency [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Agency Residential Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Agency Commercial Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Private Label Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Asset Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Obligations of States and Political Subdivisions [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Trust Preferred [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Foreign Government [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Loans held for sale, carried at fair value		99,747	69,800
Capitalized mortgage loan servicing rights		0	0
Derivatives	[1]	19,202	5,464
Liabilities [Abstract]
Derivatives	[2]	12,690	4,402
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency [Member]
Assets [Abstract]
Securities available for sale		11,130	14,661
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency Residential Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		335,560	227,762
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Agency Commercial Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		8,421	10,756
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Private Label Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		44,285	39,693
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Asset Backed [Member]
Assets [Abstract]
Securities available for sale		263,371	93,886
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Obligations of States and Political Subdivisions [Member]
Assets [Abstract]
Securities available for sale		244,978	96,102
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate [Member]
Assets [Abstract]
Securities available for sale		75,017	33,195
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Trust Preferred [Member]
Assets [Abstract]
Securities available for sale		1,770	1,843
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Foreign Government [Member]
Assets [Abstract]
Securities available for sale		518	502
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member]
Assets [Abstract]
Loans held for sale, carried at fair value		0	0
Capitalized mortgage loan servicing rights		15,403	19,171
Derivatives	[1]	0	0
Liabilities [Abstract]
Derivatives	[2]	0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | U.S. Agency [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | U.S. Agency Residential Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | U.S. Agency Commercial Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Private Label Mortgage-Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Other Asset Backed [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Obligations of States and Political Subdivisions [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Corporate [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Trust Preferred [Member]
Assets [Abstract]
Securities available for sale		0	0
Recurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Foreign Government [Member]
Assets [Abstract]
Securities available for sale		0	0
Nonrecurring Basis [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial and Industrial [Member]
Impaired loans [Abstract]
Loans receivable	[3]	1,591	655
Nonrecurring Basis [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[3]	7,098	316
Nonrecurring Basis [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	500	987
Nonrecurring Basis [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	284	470
Nonrecurring Basis [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]
Impaired loans [Abstract]
Loans receivable	[3]	58	281
Nonrecurring Basis [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family - 2nd Lien [Member]
Impaired loans [Abstract]
Loans receivable	[3]	200	294
Nonrecurring Basis [Member] | Impaired Loans [Member] | Mortgage [Member] | Resort Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	77	245
Nonrecurring Basis [Member] | Impaired Loans [Member] | Installment [Member] | Boat Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	90	67
Nonrecurring Basis [Member] | Impaired Loans [Member] | Installment [Member] | Recreational Vehicle Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	38	2
Nonrecurring Basis [Member] | Impaired Loans [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[3]	139	121
Nonrecurring Basis [Member] | Other Real Estate [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[4]	474
Nonrecurring Basis [Member] | Other Real Estate [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[5]		31
Nonrecurring Basis [Member] | Other Real Estate [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[5]		28
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial and Industrial [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family - 2nd Lien [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Mortgage [Member] | Resort Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Installment [Member] | Boat Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Installment [Member] | Recreational Vehicle Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired Loans [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Real Estate [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[4]	474
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Real Estate [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[5]		0
Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Real Estate [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[5]		0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial and Industrial [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family - 2nd Lien [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Mortgage [Member] | Resort Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Installment [Member] | Boat Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Installment [Member] | Recreational Vehicle Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired Loans [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[3]	0	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Real Estate [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[4]	0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Real Estate [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[5]		0
Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Real Estate [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[5]		0
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial and Industrial [Member]
Impaired loans [Abstract]
Loans receivable	[3]	1,591	655
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[3]	7,098	316
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	500	987
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[3]	284	470
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family Non-owner Occupied [Member]
Impaired loans [Abstract]
Loans receivable	[3]	58	281
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Mortgage [Member] | 1-4 Family - 2nd Lien [Member]
Impaired loans [Abstract]
Loans receivable	[3]	200	294
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Mortgage [Member] | Resort Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	77	245
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Installment [Member] | Boat Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	90	67
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Installment [Member] | Recreational Vehicle Lending [Member]
Impaired loans [Abstract]
Loans receivable	[3]	38	2
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Impaired Loans [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[3]	139	121
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Other Real Estate [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Loans receivable	[4]	$ 0
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Other Real Estate [Member] | Mortgage [Member] | 1-4 Family Owner Occupied - Non-jumbo [Member]
Impaired loans [Abstract]
Loans receivable	[5]		31
Nonrecurring Basis [Member] | Significant Un-observable Inputs (Level 3) [Member] | Other Real Estate [Member] | Installment [Member] | Other [Member]
Impaired loans [Abstract]
Loans receivable	[5]		$ 28

[1] Included in accrued income and other assets

[2] Included in accrued expenses and other liabilities

[3] Only includes impaired loans with specific loss allocations based on collateral value.

[4] Only includes other real estate with subsequent write downs to fair value. The fair value of the commercial real estate property included in this table was based on a purchase agreement executed during the third quarter of 2020 that closed during the fourth quarter of 2020.

[5] Only includes other real estate with subsequent write downs to fair value