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Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($)
Balance, value | $ (53,842)
Balance, value | (48,982)
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |
Balance, value | (36,470)
Other comprehensive income (loss) before reclassifications | 679
Gains reclassified from accumulated other comprehensive income | 1,585
Balance, value | (34,206)
Unrealized (Loss) Gain on Investments, Net of Tax [Member] |
Balance, value | (22)
Other comprehensive income (loss) before reclassifications | 118
Balance, value | 96
Unrealized (Loss) Gain on Derivative Instruments, Net of Tax [Member] |
Balance, value | (5,219)
Other comprehensive income (loss) before reclassifications | (2,388)
Gains reclassified from accumulated other comprehensive income | 1,585
Balance, value | (6,022)
Unrealized Loss on Net Investment Hedge, Net of Tax [Member] |
Balance, value | (4,311)
Other comprehensive income (loss) before reclassifications | (2,216)
Balance, value | (6,527)
Cumulative Translation Adjustment [Member] |
Balance, value | (26,918)
Other comprehensive income (loss) before reclassifications | 5,165
Balance, value | $ (21,753)

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