Employee Benefit Plans (Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Noncash Expense [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	$ 737	$ (530)	$ (1,092)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	(128)	131	254
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	609	(399)	$ (838)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	7,445	8,182
Underfunded pension liability, deferred tax benefit	(1,784)	(1,912)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	$ 5,661	$ 6,270