Accumulated Other Comprehensive Income - Balances in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ (380,726)	$ 445,000
Change in net unrealized holding gains (losses) on securities, before reclassification, net of tax expense (benefit)	(1,068,000)	151,000
Reclassification for previously unrealized net (gains) recognized in income, net of tax benefit	(3,000)	(632,000)
Net periodic pension cost, net of tax benefit		(498,000)
Net gain (loss) on pension and postretirement plans, net of tax expense	276,000	152,000
Net postretirement plan transition cost, net of tax expense	2,000	1,000
Ending Balance	(1,173,533)	(380,726)
Holding gains (losses) on securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	280,000	761,000
Change in net unrealized holding gains (losses) on securities, before reclassification, net of tax expense (benefit)	(1,068,000)	151,000
Reclassification for previously unrealized net (gains) recognized in income, net of tax benefit	(3,000)	(632,000)
Ending Balance	(791,000)	280,000
Pension and Post employment costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(661,000)	(316,000)
Net periodic pension cost, net of tax benefit		(498,000)
Net gain (loss) on pension and postretirement plans, net of tax expense	276,000	152,000
Net postretirement plan transition cost, net of tax expense	2,000	1,000
Ending Balance	$ (383,000)	$ (661,000)