Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities			$ 14,592
Realized gain on sale of securities, net of tax			(547)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax			111
Other comprehensive (loss) income, net of reclassifications and tax			(13,245)
Unrealized Gain on Securities	$ 1,894		1,894
Unrecognized Net Pension and Postretirement Costs			(3,872)
Other comprehensive (loss) income, net of reclassifications and tax			1,481
Unrecognized Net Pension and Postretirement Costs	(2,280)		(2,280)
Unrealized Loss on Cash Flow Hedge			(9,384)
Other comprehensive (loss) income, net of reclassifications and tax	768	$ 635	3,882	$ (7,632)
Unrealized Loss on Cash Flow Hedge	(5,502)		(5,502)
Accumulated Other Comprehensive (Loss) Income			1,336
Accumulated Other Comprehensive (Loss) Income	$ (5,888)		(5,888)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			$ (7,882)