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Loans and Leases - Information Regarding Troubled Debt Restructurings (Details) - Non-Covered Loans - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	$ 34,285	$ 40,499
Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	14,967	1,254
Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	19,318	39,245
Multi-Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		3,577
Multi-Family | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		3,577
Commercial Real Estate
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	14,967
Commercial Real Estate | Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	14,967
One-to-Four Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	557	584
One-to-Four Family | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	557	584
Acquisition, Development, and Construction
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		389
Acquisition, Development, and Construction | Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		389
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	18,761	35,949
Commercial and Industrial | Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		865
Commercial and Industrial | Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	$ 18,761	$ 35,084

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Amount of financing receivable modified as troubled debt restructuring.

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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 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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