Other current liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Payables And Accruals [Abstract]

Summary of Other Current Liabilities

	December 31,
(U.S. Dollars, in thousands)	2012		2011
	(Restated)		(Restated)
Accrued expenses	$	17,452	$	15,002
Salaries, bonuses, commissions and related taxes payable		17,915		22,743
Other payables		4,227		3,091
	$	39,594	$	40,836