Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities	$ 2,542
Realized gain on sale of securities, net of tax	(397)
Other comprehensive income, net of reclassifications and tax	1,487
Unrealized Gain on Securities	3,632
Unrecognized Net Pension and Postretirement Costs	(3,843)
Realized loss due to settlement and curtailment, net of tax	242
Other comprehensive income, net of reclassifications and tax	371
Unrecognized Net Pension and Postretirement Costs	(3,230)
Accumulated Other Comprehensive Income (Loss)	(1,301)
Realized gain on sale of securities, net of tax	(397)
Realized loss due to settlement and curtailment, net of tax	242
Other comprehensive income, net of reclassifications and tax	1,858
Accumulated Other Comprehensive Income (Loss)	$ 402