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Accumulated other comprehensive income (Tables) | 3 Months Ended
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Mar. 31, 2014
Equity [Abstract] |
Components of Changes in Accumulated Other Comprehensive Income | The components of and changes in accumulated other comprehensive income were as follows:
(U.S. Dollars, in thousands) |  | Foreign Currency Translation Adjustments |  |  | Change in Fair Value |  |  | Accumulated Other Comprehensive Income |
|  | (Restated) |  |  | (Restated) |  |  | (Restated) |
Balance at December 31, 2013 |  | $ | 3,651 |  |  | $ | (148 | ) |  | $ | 3,503 |
Unrealized gain on cross-currency swap and warrants, net of tax of $25 |  |  | — |  |  |  | 103 |  |  |  | 103 |
Foreign currency translation adjustment (1) |  |  | 376 |  |  |  | — |  |  |  | 376 |
Balance at March 31, 2014 |  | $ | 4,027 |  |  | $ | (45 | ) |  | $ | 3,982 |
(1) | As the cash generally remains permanently invested in the non-U.S. dollar denominated foreign subsidiaries, no deferred taxes are recognized on the related foreign currency translation adjustment.

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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=28358780&loc=SL7669686-108580 + Details
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