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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2016
Statement of Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The components of accumulated other comprehensive income (loss) were as follows (in thousands):
| Foreign currency translation adjustment |  | Changes in fair value of derivative, net of tax |  | Accumulated other comprehensive income (loss)
Balance at December 31, 2013 | $ | 324 |  |  | $ | (208 | ) |  | $ | 116 |
Other comprehensive income (loss) | (4,772 | ) |  | 86 |  |  | (4,686 | )
Balance at December 31, 2014 | (4,448 | ) |  | (122 | ) |  | (4,570 | )
Other comprehensive income (loss) | (3,714 | ) |  | 122 |  |  | (3,592 | )
Balance at December 31, 2015 | (8,162 | ) |  | — |  |  | (8,162 | )
Other comprehensive income (loss) | (1,861 | ) |  | — |  |  | (1,861 | )
Balance at December 31, 2016 | $ | (10,023 | ) |  | $ | — |  |  | $ | (10,023 | )

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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=66004124&loc=SL7669686-108580 + Details
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