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Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Activity within Accumulated Other Comprehensive Loss | Activity within accumulated other comprehensive loss for the six months ended June 30, 2018 and 2017, which consists of foreign currency translation adjustments, were as follows:
(in thousands) |  | Accumulated other comprehensive loss |
Balance at December 31, 2017 |  | $ | (77,356 | )
Other comprehensive loss |  |  | (7,248 | )
Balance at June 30, 2018 |  | $ | (84,604 | )
|  | Accumulated other comprehensive loss |
Balance at December 31, 2016 |  | $ | (94,100 | )
Other comprehensive income |  |  | 15,120 |
Balance at June 30, 2017 |  | $ | (78,980 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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