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Common Stock and Accumulated Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Income (Loss) | The changes in each component of Accumulated Other Comprehensive Income (Loss) for the years ended December 31, 2020, 2019 and 2018 were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Cash Flow Hedges |  | Foreign Currency Translation |  | Total
December 31, 2017 | $ | 3,474 | ​ | $ | (1,940) | ​ | $ | 1,534
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) |  | 2,098 | ​ | ​ | (3,606) | ​ | ​ | (1,508)
Income taxes |  | (16) | ​ | ​ | (9) | ​ | ​ | (25)
Reclassifications to: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenue | ​ | (136) | ​ | ​ | ​ | ​ | ​ | (136)
Cost of sales | ​ | (361) | ​ | ​ | ​ | ​ | ​ | (361)
Interest expense | ​ | (1,537) | ​ | ​ | ​ | ​ | ​ | (1,537)
Net other comprehensive income (loss) | ​ | 48 | ​ | ​ | (3,615) | ​ | ​ | (3,567)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2018 | ​ | 3,522 | ​ | ​ | (5,555) | ​ | ​ | (2,033)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) |  | (3,417) | ​ | ​ | (18) | ​ | ​ | (3,435)
Income taxes |  | 1,404 | ​ | ​ | 61 | ​ | ​ | 1,465
Reclassifications to: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenue | ​ | (577) | ​ | ​ | ​ | ​ | ​ | (577)
Cost of sales | ​ | 578 | ​ | ​ | ​ | ​ | ​ | 578
Interest expense | ​ | (2,040) | ​ | ​ | ​ | ​ | ​ | (2,040)
Net other comprehensive income (loss) | ​ | (4,052) | ​ | ​ | 43 | ​ | ​ | (4,009)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reclassification of stranded tax effects 1 | ​ | 748 | ​ | ​ | ​ | ​ | ​ | 748
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | 218 | ​ | ​ | (5,512) | ​ | ​ | (5,294)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) |  | (11,647) | ​ | ​ | 7,786 | ​ | ​ | (3,861)
Income taxes |  | 2,365 | ​ | ​ | (786) | ​ | ​ | 1,579
Reclassifications to: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenue | ​ | (36) | ​ | ​ | ​ | ​ | ​ | (36)
Cost of sales | ​ | 1,288 | ​ | ​ | ​ | ​ | ​ | 1,288
Interest expense | ​ | 872 | ​ | ​ | ​ | ​ | ​ | 872
Net other comprehensive income (loss) | ​ | (7,158) | ​ | ​ | 7,000 | ​ | ​ | (158)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 | $ | (6,940) | ​ | $ | 1,488 | ​ | $ | (5,452)
(1) | Amounts reclassified to retained earnings as a result of the adoption of ASU 2018-02.

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580 + Details
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