Derivative instruments (Tables)

12 Months Ended

Dec. 31, 2011

Derivative instruments

Schedule of fair values of derivative instruments

(US$ in thousands)	Fair value: favorable (unfavorable)			Balance sheet location
As of December 31, 2011
Cross-currency swap	$	1,011		Other long-term assets
As of December 31, 2010
Cross-currency swap	$	(262	)	Other long-term liabilities

Schedule of gain (loss) recognized on derivative instruments

	For the year ended December 31,
(US$ in thousands)	2011			2010			2009
Interest rate swap gain recognized in net income (loss)	$	—		$	1,254		$	1,852
Cross-currency swap loss recorded in other comprehensive income (loss), net of taxes of $256	(437		)	(90		)	(2,702		)