Other current liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Payables And Accruals [Abstract]

Summary of Other Current Liabilities

	December 31,
(U.S. Dollars, in thousands)	2016		2015
Accrued expenses	$	15,534	$	19,616
Salaries, bonuses, commissions and related taxes payable		19,636		18,190
Accrued legal and settlement expenses		23,081		22,608
Non-income taxes payable		7,301		1,428
Other payables		3,536		3,755
	$	69,088	$	65,597