Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Equity [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	$ (120)		$ (120)		$ 0
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities			2,869
Realized gain on sale of securities, net of tax			(560)
Other comprehensive income (loss), net of reclassifications and tax			9,542
Unrealized Gain on Securities	11,851		11,851
Unrecognized Net Pension and Postretirement Costs			3,228
Other comprehensive income (loss), net of reclassifications and tax			44
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	44	$ 0	(120)	$ 0
Unrecognized Net Pension and Postretirement Costs	(3,184)		(3,184)
Accumulated Other Comprehensive Income (Loss)			(359)
Realized gain on sale of securities, net of tax			(560)
Other comprehensive income (loss), net of reclassifications and tax			9,466
Accumulated Other Comprehensive Income (Loss)	$ 8,547		$ 8,547