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Income taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Schedule of Provision for (Benefit from) Income Taxes on Continuing Operations | The provision for (benefit from) income taxes on continuing operations in the accompanying consolidated statements of operations consists of the following:
|  | Year Ended December 31, |
(U.S. Dollars, in thousands) |  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (Restated) |  |  | (Restated) |  |  | (Restated) |
U.S. |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | 17,897 |  |  | $ | 25,148 |  |  | $ | 19,336 |
Deferred |  |  | 1,788 |  |  |  | (12,657 | ) |  |  | 2,282 |
Total U.S |  |  | 19,685 |  |  |  | 12,491 |  |  |  | 21,618 |
Non-U.S. |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 4,609 |  |  |  | 2,735 |  |  |  | 253 |
Deferred |  |  | 844 |  |  |  | (1,061 | ) |  |  | 2,160 |
|  |  | 5,453 |  |  |  | 1,674 |  |  |  | 2,413 |
Total tax expense |  | $ | 25,138 |  |  | $ | 14,165 |  |  | $ | 24,031 |
Schedule of Tax Effects of Significant Temporary Differences Comprising Deferred Tax Assets and Liabilities | The tax effects of the significant temporary differences, which comprise the deferred tax assets and liabilities, are as follows:
|  | Year Ended December 31, |
(U.S. Dollars, in thousands) |  | 2012 |  |  | 2011 |
|  | (Restated) |  |  | (Restated) |
Intangible assets and goodwill |  | $ | 5,346 |  |  | $ | 5,300 |
Inventories and related reserves |  |  | 14,020 |  |  |  | 13,756 |
Deferred revenue and cost of sales |  |  | 11,682 |  |  |  | 7,631 |
Other accruals and reserves |  |  | 3,868 |  |  |  | 10,287 |
Accrued compensation |  |  | 3,817 |  |  |  | 4,444 |
Allowance for doubtful accounts |  |  | 3,718 |  |  |  | 4,029 |
Accrued interest |  |  | 18,229 |  |  |  | 16,123 |
Net operating loss carryforwards |  |  | 27,231 |  |  |  | 20,849 |
Other, net |  |  | 539 |  |  |  | (349 | )
|  |  | 88,450 |  |  |  | 82,070 |
Valuation allowance |  |  | (26,361 | ) |  |  | (19,124 | )
Deferred tax asset |  | $ | 62,089 |  |  | $ | 62,946 |
Withholding taxes |  |  | (11,456 | ) |  |  | (9,778 | )
Property, plant and equipment |  |  | (9,758 | ) |  |  | (9,892 | )
Deferred tax liability |  |  | (21,214 | ) |  |  | (19,670 | )
Net deferred tax assets |  | $ | 40,875 |  |  | $ | 43,276 |
Schedule of Effective Income Tax Rate Reconciliation for Continuing Operations | The rate reconciliation for continuing operations presented below is based on the U.S. federal income tax rate, rather than the parent company’s country of domicile tax rate. Management believes, given the large proportion of taxable income earned in the United States, such disclosure is more meaningful.
(US$ in thousands, except percentages) |  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Amount |  |  | Percent |  |  | Amount |  |  | Percent |  |  | Amount |  |  | Percent |
|  | (Restated) |  |  | (Restated) |  |  | (Restated) |  |  | (Restated) |  |  | (Restated) |  |  | (Restated) |
Statutory U.S. federal income tax rate |  | $ | 24,565 |  |  |  | 35.0 | % |  | $ | (719 | ) |  |  | 35.0 | % |  | $ | 19,261 |  |  |  | 35.0 | %
State taxes, net |  |  | 1,708 |  |  |  | 2.4 | % |  |  | 1,896 |  |  |  | (92.4 | )% |  |  | 2,051 |  |  |  | 3.7 | %
Foreign rate differential |  |  | (3,115 | ) |  |  | (4.4 | )% |  |  | 1,585 |  |  |  | (77.2 | )% |  |  | 251 |  |  |  | 0.5 | %
Valuation allowance—foreign losses |  |  | 6,183 |  |  |  | 8.8 | % |  |  | 4,882 |  |  |  | (237.8) | % |  |  | 3,497 |  |  |  | 6.4 | %
SRL Intangible |  |  | (2,214 | ) |  |  | (3.2 | )% |  |  | (2,421 | ) |  |  | 117.9 | % |  |  | (2,607 | ) |  |  | (4.7 | )%
Domestic manufacturing deduction |  |  | (1,694 | ) |  |  | (2.4 | )% |  |  | (1,703 | ) |  |  | 82.9 | % |  |  | (1,529 | ) |  |  | (2.8 | )%
Withholding Taxes |  |  | 1,679 |  |  |  | 2.4 | % |  |  | 1,676 |  |  |  | (81.6 | )% |  |  | 1,687 |  |  |  | 3.1 | %
Settlement of U.S. Government resolutions |  |  | (1,260 | ) |  |  | (1.8 | )% |  |  | 9,520 |  |  |  | (463.7 | )% |  |  | — |  |  |  | — | %
Other items, net |  |  | (714 | ) |  |  | (1.0 | )% |  |  | (551 | ) |  |  | 26.9 | % |  |  | 1,420 |  |  |  | 2.5 | %
Income tax expense/effective rate |  | $ | 25,138 |  |  |  | 35.8 | % |  | $ | 14,165 |  |  |  | (690.0 | )% |  | $ | 24,031 |  |  |  | 43.7 | %
Schedule of Gross Unrecognized Tax Benefits (Excluding Interest and Penalties) | A reconciliation of the gross unrecognized tax benefits (excluding interest and penalties) for the years ended December 31, 2012 and December 31, 2011 follows:
(U.S. Dollars, in thousands) |  | 2012 |  |  | 2011 |
|  | (Restated) |  |  | (Restated) |
Balance as of January 1, |  | $ | 610 |  |  | $ | 569 |
Additions for current year tax positions |  |  | 793 |  |  |  | 86 |
Decreases for prior year tax positions |  |  | (106 | ) |  |  | (17 | )
Expiration of statutes |  |  | (108 | ) |  |  | (28 | )
Balance as of December 31, |  | $ | 1,189 |  |  | $ | 610 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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