Compensation and Benefit Plans - Additional Information (Details)							3 Months Ended				9 Months Ended		12 Months Ended
	Apr. 01, 2022 shares	Jan. 28, 2022 shares	Jan. 27, 2022 USD ($) shares	Jan. 01, 2021 USD ($)	Dec. 04, 2018 shares	Sep. 29, 2017 USD ($) shares	Sep. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 $ / shares shares	Mar. 31, 2022 $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Executive $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 $ / shares shares	Dec. 31, 2020 $ / shares shares
Compensation And Benefit Plans Disclosure [Line Items]
Additional number of shares							2,066,481				2,066,481		700,896
ESOP related compensation expense including equalization expense | $							$ 330,000			$ 182,000	$ 1,000,000.0	$ 513,000
Number of option grants								68,329					0
Number of stock grants							0
Total remaining unrecognized compensation cost | $							$ 2,500,000				$ 2,500,000
Weighted average period expected to be recognized											63 months
Weighted-average exercise price for options | $ / shares							$ 8.97	$ 8.97	$ 8.62		$ 8.97		$ 12.02	$ 12.02
Weighted average remaining contractual life											6 years 10 months 24 days
Weighted average period expected to be recognized											3 years 9 months 18 days
Number of shares exercisable							147,301	147,301			147,301		94,904
Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Vesting percentage														20.00%
Non-Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Vesting percentage														20.00%
Non-Executive Officers Not Director
Compensation And Benefit Plans Disclosure [Line Items]
Vesting percentage														20.00%
Restricted Stock Units
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants								63,715	0
Compensation expense | $							$ 360,000			318,000	$ 1,000,000.0	955,000
Total remaining unrecognized compensation cost | $							493,000				$ 493,000
Weighted average period expected to be recognized											63 months
Stock Options
Compensation And Benefit Plans Disclosure [Line Items]
Compensation expense | $							$ 45,000			33,000	$ 124,000	$ 99,000
Weighted average period expected to be recognized											6 years 6 months	6 years 6 months
2018 Long-Term Incentive Plan
Compensation And Benefit Plans Disclosure [Line Items]
Equity incentive plans, maximum number of shares issuable							1,248,469				1,248,469
Common stock reserved for future issuance							1,248,469				1,248,469
Conversion of issuable stock options to issuable restricted stock ratio											3.0
Number of issuable stock options converted into restricted stock units											462,522
Number of restricted stock units converted from issuable stock options											154,174
Number of grants					674,645
2018 Long-Term Incentive Plan | Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Vesting percentage														20.00%
2018 Long-Term Incentive Plan | Directors
Compensation And Benefit Plans Disclosure [Line Items]
Vesting percentage														20.00%
Vesting period														10 years
2018 Long-Term Incentive Plan | Stock Options or Stock Appreciation Rights
Compensation And Benefit Plans Disclosure [Line Items]
Common stock reserved for future issuance							891,764				891,764
Shares available for future awards							4,883				4,883		189,476
2018 Long-Term Incentive Plan | Restricted Stock Units
Compensation And Benefit Plans Disclosure [Line Items]
Common stock reserved for future issuance							356,705				356,705
Shares available for future awards							0				0		0
2018 Long-Term Incentive Plan | Restricted Stock Units | Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants	40,460				322,254
2018 Long-Term Incentive Plan | Restricted Stock Units | Outside Directors
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants	23,255				148,625
2018 Long-Term Incentive Plan | Restricted Stock Units | Non-Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants	30,659				40,000
2018 Long-Term Incentive Plan | Restricted Stock Units | Non-Executive Officers | December 31, 2020
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants														15,000
2018 Long-Term Incentive Plan | Incentive Options | Executive Officers
Compensation And Benefit Plans Disclosure [Line Items]
Number of option grants	23,718				119,176
2018 Long-Term Incentive Plan | Incentive Options | Non-Executive Officers | December 31, 2020
Compensation And Benefit Plans Disclosure [Line Items]
Number of stock grants														40,000
2018 Long-Term Incentive Plan | Non-qualified Options | Outside Directors
Compensation And Benefit Plans Disclosure [Line Items]
Number of option grants	13,952				44,590
2020 Long-Term Incentive Plan
Compensation And Benefit Plans Disclosure [Line Items]
Number of issuable stock options converted into restricted stock units											45,000
Number of restricted stock units converted from issuable stock options											15,000
2022 Long-Term Incentive Plan
Compensation And Benefit Plans Disclosure [Line Items]
Number of issuable stock options converted into restricted stock units											191,145
Number of restricted stock units converted from issuable stock options											63,715
Supplemental Executive Retirement Plan
Compensation And Benefit Plans Disclosure [Line Items]
Expense recognized | $							$ 15,000			15,000	$ 45,000	$ 45,000
Number of key executive under retirement plan | Executive											2
Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Total issued shares		24,711,834
PDL Community Bancorp | Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Conversion of stock		1.3952	977,880
KSOP
Compensation And Benefit Plans Disclosure [Line Items]
Defined contribution plan, maximum annual contributions per employee, amount | $				$ 20,500
Defined contribution plan additional cost | $				$ 6,500
Employer matching contribution percentage				3.00%
Expense recognized | $				$ 27,000
Expenses recognized | $							$ 64,000			$ 96,000	$ 256,000	$ 279,000
Defined contribution plan, employers matching contribution, annual vesting percentage				100.00%
Defined contribution plan, employer matching contribution, percent of employees' gross pay				20.00%
Defined contribution plan additional cost percentage				20
Number of years discretionary matching and profit sharing contributions				2 years
Number of additional year of service cost				6 years
KSOP | PDL Community Bancorp | Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Additional number of shares			1,097,353
Percentage of Shares Outstanding			4.44
ESOP
Compensation And Benefit Plans Disclosure [Line Items]
Defined contribution plan, employers matching contribution, annual vesting percentage			100.00%
Number of years discretionary matching and profit sharing contributions			3 years
ESOP | PDL Community Bancorp | Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Additional number of shares						723,751
First ESOP Loan
Compensation And Benefit Plans Disclosure [Line Items]
Total issued shares							14,400,000				14,400,000
First ESOP Loan | PDL Community Bancorp
Compensation And Benefit Plans Disclosure [Line Items]
Employee stock ownership plan ESOP loan term						15 years
Employee stock ownership plan ESOP interest percentage						2.60
First ESOP Loan | PDL Community Bancorp | Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Aggregate purchase price of common | $						$ 7,200,000
Second ESOP Loan
Compensation And Benefit Plans Disclosure [Line Items]
Total issued shares							14,400,000				14,400,000
Second ESOP Loan | PDL Community Bancorp
Compensation And Benefit Plans Disclosure [Line Items]
Employee stock ownership plan ESOP loan term			15 years
Employee stock ownership plan ESOP interest percentage			1.822
Second ESOP Loan | PDL Community Bancorp | Common Stock
Compensation And Benefit Plans Disclosure [Line Items]
Aggregate purchase price of common | $			$ 11,000,000.0