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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity Attributable to Parent [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The components of AOCI, net of tax, were as follows (in thousands):
|  | Foreign Currency Translation Adjustments |  | Unrealized Gains on Cash Flow Hedges |  | Other Adjustments |  | Total
Balance as of December 31, 2016 |  | $ | (21,272 | ) |  | $ | — |  |  | $ | — |  |  | $ | (21,272 | )
Other comprehensive income (loss) before reclassifications |  | 6,694 |  |  | 184 |  |  | (16 | ) |  | 6,862 |
Amounts reclassified from AOCI |  | — |  |  | (549 | ) |  | — |  |  | (549 | )
Other comprehensive income (loss) |  | 6,694 |  |  | (365 | ) |  | (16 | ) |  | 6,313 |
Balance as of December 31, 2017 |  | $ | (14,578 | ) |  | $ | (365 | ) |  | $ | (16 | ) |  | $ | (14,959 | )

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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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