Parent Company Only Financial Statements - Schedule of Condensed Consolidated Statements of Income (Loss) (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
Condensed Financial Statements Captions [Line Items]
Interest on other deposits									$ 1,427	$ 2,174	$ 2,827
Net interest income	$ 16,782	$ 15,440	$ 13,732	$ 12,892	$ 11,674	$ 10,851	$ 9,521	$ 9,924	58,846	41,970	38,133
Share-based compensation expense									1,405	1,403	1,256
Office occupancy and equipment									11,328	9,564	7,612
Professional fees									7,629	6,049	3,237
Other noninterest expenses									4,567	3,363	2,395
Total non-interest expense	15,854	14,732	13,641	12,915	13,955	12,327	10,435	10,822	57,142	47,539	46,607
Income (loss) before income taxes	19,224	3,370	7,846	3,184	2,112	5,156	(611)	(1,422)	33,624	5,235	(6,049)
Benefit for income taxes	4,245	1,318	1,914	732	484	1,147	(40)	(209)	8,209	1,382	(924)
Net income (loss)	$ 14,979	$ 2,052	$ 5,932	$ 2,452	$ 1,628	$ 4,009	$ (571)	$ (1,213)	25,415	3,853	$ (5,125)
Ponce Bank Mutual Holding Company
Condensed Financial Statements Captions [Line Items]
Interest on ESOP loan									142	153
Interest on other deposits									16	86
Net interest income									158	239
Share-based compensation expense									1,405	1,403
Management fee expense									514	514
Office occupancy and equipment									58	55
Professional fees									1,240	1,625
Other noninterest expenses									72	67
Total non-interest expense									3,289	3,664
Income (loss) before income taxes									(3,131)	(3,425)
Benefit for income taxes									(381)	(659)
Equity in undistributed earnings of Ponce Bank and Mortgage World									28,165	6,619
Net income (loss)									$ 25,415	$ 3,853