Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair value measurements

Schedule of financial assets and liabilities recorded at fair value on a recurring basis

(US$ in thousands)	Balance December 31, 2011		Level 1		Level 2		Level 3
Derivative Financial Instruments (1)
Cash Flow Hedges
Cross currency hedge	$	1,011	$	—	$	1,011	$	—

(1)   See Note 9, “Derivative Instruments”.

(US$ in thousands)	Balance December 31, 2010			Level 1		Level 2			Level 3
Derivative Financial Instruments (1)
Cash Flow Hedges
Cross currency hedge	$	(262	)	$	—	$	(262	)	$	—