Schedule 2-Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2014

Valuation And Qualifying Accounts [Abstract]

Schedule 2-Valuation and Qualifying Accounts

Schedule 2—Valuation and Qualifying Accounts

For the years ended December 31, 2014, 2013 and 2012:

			Additions
(U.S. Dollars in thousands) Provisions from assets to which they apply	Balance at beginning of year		Charged to cost and expenses		Charged (credited) to other accounts			Deductions/ Other			Balance at end of year
2014
Allowance for doubtful accounts receivable	$	9,111	$	937		—		$	(2,763	)	$	7,285
Deferred tax valuation allowance		31,772		5,666		—			—			37,438
2013
Allowance for doubtful accounts receivable	$	6,673	$	4,590		—		$	(2,152	)	$	9,111
Deferred tax valuation allowance		26,361		5,411		—			—			31,772
2012
Allowance for doubtful accounts receivable	$	6,184	$	2,027	$	(13	)	$	(1,525	)	$	6,673
Deferred tax valuation allowance		19,124		7,237		—			—			26,361