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Employee Benefit Plans (Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amortization of net loss | $ (926) | $ (159) | $ (1,344)
Total recognized in other comprehensive loss | 8 | (9,581) | $ 13,176
Defined Benefit Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial gain (loss) | (894) | (9,669) |
Amortization of net loss | 926 | 159 |
Amortization of prior service cost (credit) | 20 | 20 |
Total recognized in other comprehensive loss | 52 | (9,490) |
Other Postretirement Benefit Plans Defined Benefit [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net actuarial gain (loss) | 7 | (40) |
Amortization of net loss | 17 | 17 |
Amortization of prior service cost (credit) | (68) | (68) |
Total recognized in other comprehensive loss | $ (44) | $ (91) |

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