| Cover | Oct. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 29, 2021 |
| Entity File Number | 001-40589 |
| Entity Registrant Name | NORTHEAST COMMUNITY BANCORP, INC. |
| Entity Central Index Key | 0001847398 |
| Entity Tax Identification Number | 86-3173858 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 325 Hamilton Avenue |
| Entity Address, City or Town | White Plains |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10601 |
| City Area Code | 914 |
| Local Phone Number | 684-2500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | NECB |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
