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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2017
Comprehensive Income Net Of Tax [Abstract] |
Schedule Of Accumulated Other Comprehensive Loss | The changes in accumulated other c omprehensive loss by component we re as follows:
|  |  |  | Foreign |  |  |  |  | Unrealized |  |  |  |  |
|  |  |  | currency |  |  | Derivative |  |  | loss on |  |  |  |  |  |
|  |  |  | translation |  |  | instruments, |  | investments, |  |  |  |  |
(in thousands) |  |  | adjustments |  |  | net of tax |  |  | net of tax |  |  | Other |  |  | Total
Balances, December 31, 2014 |  | $ | (9,688) |  | $ | — |  | $ | (64) |  | $ | 277 |  | $ | (9,475)
| Other comprehensive loss before reclassifications |  |  | (3,391) |  |  | — |  |  | (31) |  |  | (106) |  |  | (3,528)
| Amounts reclassified from accumulated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| other comprehensive loss |  |  | — |  |  | — |  |  | — |  |  | (13) |  |  | (13)
Net current period other comprehensive loss |  |  | (3,391) |  |  | — |  |  | (31) |  |  | (119) |  |  | (3,541)
Balances, December 31, 2015 |  |  | (13,079) |  |  | — |  |  | (95) |  |  | 158 |  |  | (13,016)
| Other comprehensive gain (loss) before reclassifications |  |  | (1,465) |  |  | 286 |  |  | 21 |  |  | (1) |  |  | (1,159)
| Amounts reclassified from accumulated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| other comprehensive loss |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (1)
Net current period other comprehensive gain (loss) |  |  | (1,465) |  |  | 286 |  |  | 21 |  |  | (2) |  |  | (1,160)
Balances, December 31, 2016 |  |  | (14,544) |  |  | 286 |  |  | (74) |  |  | 156 |  |  | (14,176)
| Other comprehensive gain (loss) before reclassifications |  |  | 4,977 |  |  | 1,192 |  |  | 33 |  |  | (175) |  |  | 6,027
Net current period other comprehensive gain (loss) |  |  | 4,977 |  |  | 1,192 |  |  | 33 |  |  | (175) |  |  | 6,027
Balances, December 31, 2017 |  | $ | (9,567) |  | $ | 1,478 |  | $ | (41) |  | $ | (19) |  | $ | (8,149)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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