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Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Loans receivable
Total loans	$ 1,313,767	$ 1,331,194
Net deferred loan origination costs	1,062	1,069
Allowance for loan losses	(8,354)	(8,470)	$ (8,341)	$ (8,366)
Loans, net	1,306,475	1,323,793
One-to-four family residential real estate loans [Member]
Loans receivable
Total loans	66,833	70,371
Allowance for loan losses	(649)	(699)
Multi-family mortgage loans [Member]
Loans receivable
Total loans	634,328	619,870
Allowance for loan losses	(4,079)	(3,991)
Nonresidential real estate loans [Member]
Loans receivable
Total loans	148,601	152,442
Allowance for loan losses	(1,487)	(1,476)
Construction and land loans [Member]
Loans receivable
Total loans	145	172
Allowance for loan losses	(3)	(4)
Commercial loans [Member]
Loans receivable
Total loans	172,264	187,406
Allowance for loan losses	(1,422)	(1,517)
Commercial leases [Member]
Loans receivable
Total loans	289,750	299,394
Allowance for loan losses	(690)	(755)
Consumer loans [Member]
Loans receivable
Total loans	1,846	1,539
Allowance for loan losses	$ (24)	$ (28)

X

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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- Definition

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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