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Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 USD ($)
Balance, value | $ (108,213)
Balance, value | (48,391)
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |
Balance, value | (43,053)
Other comprehensive income (loss) before reclassifications | 8,992
Gains reclassified from accumulated other comprehensive income | (587)
Balance, value | (34,648)
Unrealized Gain on Investments, Net of Tax [Member] |
Balance, value | 20
Other comprehensive income (loss) before reclassifications | 109
Balance, value | 129
Unrealized Gain (Loss) on Derivative Instruments, Net of Tax [Member] |
Balance, value | 4,916
Other comprehensive income (loss) before reclassifications | (8,472)
Gains reclassified from accumulated other comprehensive income | (587)
Balance, value | (4,143)
Unrealized Gain (Loss) on Net Investment Hedge, Net of Tax [Member] |
Balance, value | 4,036
Other comprehensive income (loss) before reclassifications | (6,895)
Balance, value | (2,859)
Cumulative Translation Adjustment [Member] |
Balance, value | (52,025)
Other comprehensive income (loss) before reclassifications | 24,250
Balance, value | $ (27,775)

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