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Employee Benefit Plans (Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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 |

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