Other current liabilities (Tables)

12 Months Ended

Dec. 31, 2013

Payables And Accruals [Abstract]

Summary of Other Current Liabilities

	December 31,
(U.S. Dollars in thousands)	2013		2012
			(Restated)
Accrued expenses	$	16,016	$	9,089
Salaries, bonuses, commissions and related taxes payable		16,598		17,915
Accrued legal expenses		10,292		8,496
Other payables		3,240		4,094
	$	46,146	$	39,594