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Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss By Component) (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Beginning Balance | $ 615,948
Ending Balance | 587,833
Foreign currency translation adjustment |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Beginning Balance | (19,319)
Other comprehensive income (loss) | (11,489)
Ending Balance | (30,808)
Defined benefit pension plan |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Beginning Balance | (2,555)
Other comprehensive income (loss) | 147
Ending Balance | (2,408)
Liquidation of non-US entity and purchase of non-controlling interests |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Beginning Balance | 338
Other comprehensive income (loss) | 0
Ending Balance | 338
Accumulated Other Comprehensive Income (Loss) |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Beginning Balance | (21,536)
Other comprehensive income (loss) | (11,342)
Ending Balance | $ (32,878)

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