Consolidated Statements Of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 519		$ 505
Retirement Plans:
Net unrealized gains on retirement plans	11		95
Unrealized holding gains on financial derivative:
Change in unrealized holding losses on financial derivative	(3)		0
Reclassification adjustment for interest expense included in net income	15		15
Net unrealized gain on financial derivative	12		15
Unrealized holding gains (losses) on available-for-sale securities:
Unrealized holding gains (losses) arising during the period	320		(374)
Reclassification adjustment for net gains included in net income	(2)		(39)
Net unrealized gains (losses) on securities available-for-sale	318		(413)
Accretion of net unrealized loss on securities transferred to held-to-maturity	30	[1]	0	[1]
Other comprehensive income (loss) , before tax	371		(303)
Tax effect	(148)		121
Other comprehensive income (loss), net of tax	223		(182)
Comprehensive Income	742		323
Comprehensive income attributable to noncontrolling interest	30		0
Comprehensive income attributable to Pathfinder Bancorp, Inc.	712		323
Tax Effect Allocated to Each Component of Other Comprehensive Income (Loss)
Retirement plan net losses recognized in plan expenses	(4)		(38)
Change in unrealized holding losses on financial derivative	1		0
Reclassification adjustment for interest expense included in net income	(6)		(6)
Unrealized holding (losses) gains arising during the period	(128)		149
Reclassification adjustment for net gains included in net income	1		16
Accretion of net unrealized loss on securities transferred to held-to-maturity	(12)	[1]	0	[1]
Income tax effect related to other comprehensive income	$ (148)		$ 121

[1] The accretion of the unrealized holding losses in accumulated other comprehensive loss at the date of transfer partially offsets the amortization of the difference between the par value and the fair value of the investment securities at the date of transfer, and is an adjustment of yield.