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Loans Receivable - TDRs Subsequently Defaulted (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) contract	Jun. 30, 2020 USD ($) Contract contract	Jun. 30, 2021 USD ($) contract	Jun. 30, 2020 USD ($) contract Contract	Dec. 31, 2020 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts (1) | contract	1	4	2	7
Amortized Cost (1)	$ 46,000	$ 1,027,000	$ 789,000	$ 2,998,000
Accrued interest receivable	17,113,000		17,113,000		$ 19,418,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets	79,000		79,000
Loans Receivable [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrued interest receivable	$ 12,800,000		$ 12,800,000		$ 15,800,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts (1) | contract	1	2	2	4
Amortized Cost (1)	$ 46,000	$ 302,000	$ 789,000	$ 2,155,000
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts (1)	0	1	0	1
Amortized Cost (1)	$ 0	$ 445,000	$ 0	$ 445,000
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts (1) | contract	0	1	0	2
Amortized Cost (1)	$ 0	$ 280,000	$ 0	$ 398,000
Finance Receivable Modified Subsequent Default | Troubled Debt Restructured Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Related Specific Valuation Allowance	$ 7,000	$ 494,000	$ 7,000	$ 494,000

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
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Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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