Accumulated other comprehensive income (Tables)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Components of Changes in Accumulated Other Comprehensive Loss

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

(U.S. Dollars, in thousands)	Foreign Currency Translation Adjustments			Change in Fair Value		Accumulated Other Comprehensive Loss
Balance at December 31, 2014	$	(482	)	$	100	$	(382	)
Unrealized gain on derivative instruments,    net of tax of $529		—			936		936
Foreign currency translation adjustment (1)		(3,301	)		—		(3,301	)
Balance at June 30, 2015	$	(3,783	)	$	1,036	$	(2,747	)

(1) As the unremitted earnings generally remain indefinitely reinvested in the non U.S. dollar denominated foreign subsidiaries, no deferred taxes are recognized on the related foreign currency translation adjustment.