Fair Value Schedule of qualitative information on Level 3 measurements (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 1,103	$ 6,924
Other Assets, Fair Value Disclosure	6,783,848	7,072,339
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	1,103	6,924
Other Assets, Fair Value Disclosure	6,783,848	7,072,339
Nonrecurring basis
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	775	735
Nonrecurring basis | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	775	735
Nonrecurring basis | Residential real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	775	735
Nonrecurring basis | Residential real estate | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	$ 775	$ 735
Loans | Commercial Real Estate Portfolio Segment [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.000	0.000
Loans | Commercial Real Estate Portfolio Segment [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.093
Loans | Commercial Real Estate Portfolio Segment [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.026
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	2.320	1.390
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.100
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.200
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.283	0.118
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.100
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.103
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input		0.026
Loans | Residential real estate | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.005	0.020
Loans | Residential real estate | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.083
Loans | Residential real estate | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.786	0.478
Loans | Residential real estate | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.116	0.119
Loans | Residential real estate | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.083
Loans | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 831	$ 6,749
Loans | Nonrecurring basis | Residential real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 272	$ 175
Other real estate owned | Residential real estate | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.050	0.078
Other real estate owned | Residential real estate | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.325	0.099
Other real estate owned | Residential real estate | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.191	0.089
Other real estate owned | Nonrecurring basis | Other Real Estate Owned, Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	$ 775	$ 735