Stockholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	Unrealized Gain on Securities		Unrecognized Net Pension and Postretirement Costs		Total
Balance at the beginning at Dec. 31, 2012	$ 3,266	[1]	$ (1,441)	[2]	$ 1,825
Accumulated Other Comprehensive Income (Loss)
Other comprehensive (loss) income, before reclassifications	(5,524)	[1]	0	[2]	(5,524)
Amounts reclassified from accumulated other comprehensive income	(554)	[1]	81	[2]	(473)
Current period other comprehensive (loss) income, before tax	(6,078)	[1]	81	[2]	(5,997)
Income tax benefit (expense)	2,363	[1]	(31)	[2]	2,332
Total other comprehensive income (loss)	(3,715)	[1]	50	[2]	(3,665)
Balance at the end at Sep. 30, 2013	(449)	[1]	(1,391)	[2]	(1,840)
Balance at the beginning at Dec. 31, 2013	(1,491)	[1]	722	[2]	(769)
Accumulated Other Comprehensive Income (Loss)
Other comprehensive (loss) income, before reclassifications	1,939	[1]	0	[2]	1,939
Amounts reclassified from accumulated other comprehensive income	0	[1]	59	[2]	59
Current period other comprehensive (loss) income, before tax	1,939	[1]	59	[2]	1,998
Income tax benefit (expense)	(737)	[1]	(23)	[2]	(760)
Total other comprehensive income (loss)	1,202	[1]	36	[2]	1,238
Balance at the end at Sep. 30, 2014	$ (289)	[1]	$ 758	[2]	$ 469

[1] The pre-tax amounts reclassified from accumulated other comprehensive income (loss) are included in gain on sale of investment securities in the consolidated statements of income.

[2] The pre-tax amounts reclassified from accumulated other comprehensive income (loss) are included in the computation of net periodic pension cost.