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Shareholder's equity | 12 Months Ended
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Dec. 31, 2017
Stockholders Equity Note [Abstract] |
Shareholders' equity |
12. | Shareholders’ equity
Dividends The Company has not paid dividends to holders of its common stock in the past. Certain subsidiaries of the Company have restrictions on their ability to pay dividends in certain circumstances pursuant to the Credit Agreement. In the event that the Company decides to pay a dividend to holders of its common stock in the future with dividends received from its subsidiaries, the Company may, based on prevailing rates of taxation, be required to pay additional withholding and income tax on such amounts received from its subsidiaries. Share Repurchase Plan In August 2015, the Company’s Board of Directors authorized a share repurchase plan, authorizing the purchase of up to $75 million of the Company’s common stock through and including September 2017. The Company completed the share repurchase plan in the fourth quarter of 2016. Under the program, common shares repurchased consisted of open market transactions at prevailing market prices in accordance with the guidelines specified under Rule 10b-18 of the Exchange Act, as amended. Repurchases were made from cash on hand and cash generated from operations. For the year ended December 31, 2016, the Company repurchased 1,544,681 shares of common stock for $63.4 million with an average price per share of $41.06, which were all retired upon repurchase. Accumulated Other Comprehensive Income (Loss) Accumulated other comprehensive income (loss) is comprised of foreign currency translation adjustments; the effective portion of the gain (loss) on the Company’s cross-currency swap, which was designated and accounted for as a cash flow hedge (expired in 2016); and the unrealized (gains) losses on the Company’s debt security. The components of and changes in accumulated other comprehensive income (loss) are as follows:
(U.S. Dollars, in thousands) |  | Currency Translation Adjustments |  |  | Derivatives |  |  | Debt Security |  |  | Accumulated Other Comprehensive Income (Loss) |
Balance at December 31, 2015 |  | $ | (4,389 | ) |  | $ | 228 |  |  | $ | (2,071 | ) |  | $ | (6,232 | )
Other comprehensive loss |  |  | (726 | ) |  |  | (360 | ) |  |  | (1,744 | ) |  |  | (2,830 | )
Income taxes |  |  | — |  |  |  | 132 |  |  |  | 659 |  |  |  | 791 |
Reclassification adjustments to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other expense, net |  |  | — |  |  |  | — |  |  |  | 2,727 |  |  |  | 2,727 |
Income taxes |  |  | — |  |  |  | — |  |  |  | (1,036 | ) |  |  | (1,036 | )
Balance at December 31, 2016 |  | $ | (5,115 | ) |  | $ | — |  |  | $ | (1,465 | ) |  | $ | (6,580 | )
Other comprehensive income |  |  | 4,552 |  |  |  | — |  |  |  | 3,830 |  |  |  | 8,382 |
Income taxes |  |  | — |  |  |  | — |  |  |  | (1,475 | ) |  |  | (1,475 | )
Reclassification adjustments to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other expense, net |  |  | — |  |  |  | — |  |  |  | 5,585 |  |  |  | 5,585 |
Income taxes |  |  | — |  |  |  | — |  |  |  | (2,125 | ) |  |  | (2,125 | )
Balance at December 31, 2017 |  | $ | (563 | ) |  | $ | — |  |  | $ | 4,350 |  |  | $ | 3,787 |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 + Details
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