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Comprehensive income (loss) (Tables) | 3 Months Ended
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Mar. 31, 2013
Equity [Abstract] |
Schedule of Comprehensive Income (Loss) | The components of and changes in accumulated other comprehensive income were as follows:
(US$ in thousands) |  | Foreign Currency Translation Adjustments |  |  | Fair Value of Cross- Currency Swap |  |  | Accumulated Other Comprehensive Income |
Balance at December 31, 2012 |  | $ | 4,614 |  |  | $ | 131 |  |  | $ | 4,745 |
Unrealized gain on cross-currency swap, net of tax of $187 |  |  | — |  |  |  | (318 | ) |  |  | (318 | )
Foreign currency translation adjustment (1) |  |  | (2,708 | ) |  |  | — |  |  |  | (2,708 | )
Balance at March 31, 2013 |  | $ | 1,906 |  |  | $ | (187 | ) |  | $ | 1,719 |
(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 components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e526-108580 + Details
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