Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized (Loss) Gain on Securities, beginning balance	$ 7,439	$ (2,038)	$ 13,068
Unrealized (Loss) Gain on Securities, current period change, net of tax	(547)	9,477	(15,106)
Unrealized (Loss) Gain on Securities, ending balance	6,892	7,439	(2,038)
Unrecognized Net Pension and Postretirement Costs, beginning balance	(6,027)	(2,415)	(3,581)
Unrecognized Net Pension and Postretirement Costs, current period change, net of tax	(211)	(3,612)	1,166
Unrecognized Net Pension and Postretirement Costs, ending balance	(6,238)	(6,027)	(2,415)
Accumulated Comprehensive (Loss) Income, beginning balance	1,412	(4,453)	9,487
Accumulated Comprehensive (Loss) Income, current period change, net of tax	(758)	5,865	(13,940)
Accumulated Comprehensive (Loss) Income, ending balance	$ 654	$ 1,412	$ (4,453)