Parent Company Only Financial Statements - Schedule of Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net income (loss)	$ 14,979	$ 2,052	$ 5,932	$ 2,452	$ 1,628	$ 4,009	$ (571)	$ (1,213)	$ 25,415	$ 3,853	$ (5,125)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Deferred income tax									1,260	(932)	(2,099)
Share-based compensation expense									1,405	1,403	1,256
Decrease (increase) in other assets									(10,579)	(10,045)	1,450
Net increase (decrease) in other liabilities									(2,258)	7,354	(2,884)
Net cash provided by (used in) operating activities									18,553	(27,500)	5,046
Cash Flows From Investing Activities:
Net cash used in investing activities									(211,139)	(204,601)	(38,669)
Cash Flows From Financing Activities:
Repurchase of treasury shares									(1,607)	(4,711)	(15,763)
Proceeds from the sale of treasury stock									4,743
Net cash provided by (used in) financing activities									274,402	276,502	(8,478)
Net increase (decrease) in cash and cash equivalents									81,816	44,401	(42,101)
Beginning				72,078				27,677	72,078	27,677	69,778
Ending	153,894				72,078				153,894	72,078	27,677
Ponce Bank Mutual Holding Company
Cash Flows From Operating Activities:
Net income (loss)									25,415	3,853
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Equity in undistributed earnings of subsidiaries									(28,165)	(6,619)
Deferred income tax									(1,381)	(659)
Share-based compensation expense									1,405	1,403
Decrease (increase) in other assets									(2,193)	913
Net increase (decrease) in other liabilities									366	(840)
Net cash provided by (used in) operating activities									(4,553)	(1,949)
Cash Flows From Investing Activities:
Investment in Mortgage World										(3,464)
Investment in Grain									(500)	(500)
Loan to Foundation										606
Repayment of ESOP Loan									1,014	425
Net cash used in investing activities									514	(2,933)
Cash Flows From Financing Activities:
Funds due to Ponce Financial									122,000
Repurchase of treasury shares									(1,607)
Proceeds from the sale of treasury stock									4,743	(4,711)
Net cash provided by (used in) financing activities									125,136	(4,711)
Net increase (decrease) in cash and cash equivalents									121,097	(9,593)
Beginning				$ 3,770				$ 13,363	3,770	13,363
Ending	$ 124,867				$ 3,770				$ 124,867	$ 3,770	$ 13,363