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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) - Significant Unobservable Inputs (Level 3) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 8,918	$ 13,123
Valuation Technique	Collateral based measurement	Collateral based measurement
Unobservable Inputs	Discount to reflect current market conditions and ultimate collectibility	Discount to reflect current market conditions and ultimate collectibility
Mortgage servicing rights
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 14,462	$ 12,472
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
Minimum | 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 | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.080	0.078
Minimum | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.099	0.115
Minimum | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.000	0.000
Maximum | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	66.00%	72.00%
Maximum | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.080	0.078
Maximum | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.285	0.209
Maximum | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.045	0.010
Weighted Average | Collateral dependent loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount to reflect current market conditions and ultimate collectability	13.80%	12.40%
Weighted Average | Mortgage servicing rights | Measurement Input, Discount Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.080	0.078
Weighted Average | Mortgage servicing rights | Measurement Input, Constant Prepayment Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.136	0.175
Weighted Average | Mortgage servicing rights | Measurement Input, Default Rate
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	0.005	0.008

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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