Disclosures about Fair Value of Assets and Liabilities - Qualitative Information about Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements, Other than Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) consecutive_Payment	Dec. 31, 2019 USD ($) consecutive_Payment
Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.10
Significant Unobservable Inputs (Level 3) | Mortgage servicing rights
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value | $	$ 12,472	$ 14,327
Valuation Technique	Discounted cash flows	Discounted cash flows
Unobservable Inputs	Discount rate, Constant prepayment rate, Probability of default	Discount rate, Constant prepayment rate, Probability of default
Significant Unobservable Inputs (Level 3) | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value | $	$ 13,123	$ 6,806
Valuation Technique	Collateral based measurement	Collateral based measurement
Unobservable Inputs	Discount to reflect current market conditions and ultimate collectability	Discount to reflect current market conditions and ultimate collectability
Minimum | Significant Unobservable Inputs (Level 3) | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	0.00%	0.00%
Minimum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.078	0.087
Minimum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.115	0.102
Minimum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.000	0.001
Maximum | Significant Unobservable Inputs (Level 3) | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	72.00%	100.00%
Maximum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.078	0.090
Maximum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.209	0.198
Maximum | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.010	0.029
Weighted Average | Significant Unobservable Inputs (Level 3) | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	12.40%	7.40%
Weighted Average | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.078	0.087
Weighted Average | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.175	0.122
Weighted Average | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.008	0.007