Accumulated other comprehensive loss (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Components of Changes in Accumulated Other Comprehensive Income (Loss)

The components of and changes in accumulated other comprehensive loss were as follows:

(U.S. Dollars, in thousands)	Currency Translation Adjustments			Debt Securities			Accumulated Other Comprehensive Loss
Balance at December 31, 2016	$	(5,115	)	$	(1,465	)	$	(6,580	)
Other comprehensive income (loss)		234			(3,220	)		(2,986	)
Income taxes		—			1,223			1,223
Reclassification adjustments to:
Other expense, net		—			5,585			5,585
Income taxes		—			(2,123	)		(2,123	)
Balance at March 31, 2017	$	(4,881	)	$	—		$	(4,881	)