Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income [Abstract]
Net Income before noncontrolling interest	$ 3,990	$ 3,953
Securities available for sale other-than-temporarily impaired:
Total losses
Losses recognized in earnings
Losses recognized in comprehensive income
Income tax effect
Unrealized holding (gains) losses on other-than-temporarily impaired securities available for sale, net of tax
Securities available for sale not other-than-temporarily impaired:
(Losses) gains arising during the year	(3,506)	4,834
Income tax effect	1,192	(1,643)
Gains arising during the year, net of tax	(2,314)	3,191
Gains recognized in earnings	268	267
Income tax effect	(91)	(91)
Gains recognized in earnings, net of tax	177	176
Unrealized holding gains (losses) on securities available for sale not other-than-temporarily-impaired, net of tax	(2,137)	3,367
Unrealized holding gain (loss) on securities, net	(2,137)	3,367
Pension and Postretirement Amortization	37	52
Income tax effect	(13)	(17)
Pension and Postretirement Amortization, net of tax	24	35
Fair Value adjustment on derivatives	268	220
Income tax effect	(91)	(75)
Fair Value adjustment on derivatives	177	145
Other comprehensive income (loss)	(1,936)	3,547
Net comprehensive income before noncontrolling interest	2,054	7,500
Less: net income attributable to the noncontrolling interest	276	168
Net comprehensive income attributable to ESB Financial Corporation	$ 1,778	$ 7,332

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