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Loans and Leases - Information Regarding Troubled Debt Restructurings (Details) - Non-Covered Loans - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		$ 32,198	$ 34,285
Multi-Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		6,840
Commercial Real Estate
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		14,894	14,967
One-to-Four Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		330	557
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	[1]	10,134	18,761
Accruing
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		14,894	14,967
Accruing | Commercial Real Estate
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		14,894	14,967
Non-Accrual
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		17,304	19,318
Non-Accrual | Multi-Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		6,840
Non-Accrual | One-to-Four Family
Financing Receivable Modifications [Line Items]
Troubled debt restructurings		330	557
Non-Accrual | Commercial and Industrial
Financing Receivable Modifications [Line Items]
Troubled debt restructurings	[1]	$ 10,134	$ 18,761
[1] Includes $10.0 million and $17.5 million of taxi medallion-related loans at March 31, 2021 and December 31, 2020, respectively

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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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