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Loans and Leases - Summary of Financial Effects of Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) Investment	Dec. 31, 2020 USD ($) Investment
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of loans classified as a non-accrual TDRs | Investment		8
Pre-Modification Recorded Investment		$ 1,920
Post-Modification Recorded Investment		$ 1,572
Weighted Average Interest Rate, Pre-Modification		3.29%
Weighted Average Interest Rate, Post-Modification		3.24%
Trouble debt restructuring, charge-off amount		$ 348
Multi-Family
Financing Receivable Modifications [Line Items]
Number of loans classified as a non-accrual TDRs | Investment	1
Pre-Modification Recorded Investment	$ 7,515
Post-Modification Recorded Investment	$ 7,515
Weighted Average Interest Rate, Pre-Modification	3.13%
Weighted Average Interest Rate, Post-Modification	3.25%

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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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Amount, after troubled debt restructuring, of modified financing receivable.

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-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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Amount, before troubled debt restructuring, of financing receivable to be modified.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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-Publisher FASB
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-Topic 310
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