Securities - Available-for-Sale and Held to Maturity (Schedule of Held to Maturity Securities and Related Unrecognized Gains and Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	$ 62,264	$ 62,308
Gross Unrealized Gains	307	81
Gross Unrealized Losses	(125)	(1,392)
Fair value	62,446	60,997
U.S. Treasury
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	1,000	999
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5)	(14)
Fair value	995	985
U.S. government-sponsored agencies
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	36,563	35,565
Gross Unrealized Gains	50	20
Gross Unrealized Losses	(84)	(976)
Fair value	36,529	34,609
Obligations of state and political subdivisions
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	1,914	2,358
Gross Unrealized Gains	11	14
Gross Unrealized Losses	(11)	(27)
Fair value	1,914	2,345
Mortgage-backed securities
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	22,787	23,386
Gross Unrealized Gains	246	47
Gross Unrealized Losses	(25)	(375)
Fair value	$ 23,008	$ 23,058

STEWARDSHIP FINANCIAL CORP 10-Q