Valuation Allowances (Tables)

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Summary of Valuation Allowance

Activity in the valuation accounts was as follows (in thousands):

	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions (net of recoveries)			Translation and Other, Net			Balance at End of Period
Year Ended December 31, 2017:
Allowance for doubtful accounts receivable	$	8,510	$	339	$	(1,669	)	$	136		$	7,316
Allowance for excess, damaged or obsolete inventory	14,849		2,494		(1,844		)	150			15,649
Valuation allowance on deferred tax assets	7,033		30,772		—			99			37,904
Year Ended December 31, 2016:
Allowance for doubtful accounts receivable	$	6,888	$	2,275	$	(400	)	$	(253	)	$	8,510
Allowance for excess, damaged or obsolete inventory	12,898		4,916		(2,756		)	(209		)	14,849
Valuation allowance on deferred tax assets	3,970		2,279		—			784			7,033
Year Ended December 31, 2015:
Allowance for doubtful accounts receivable	$	7,125	$	195	$	(187	)	$	(245	)	$	6,888
Allowance for excess, damaged or obsolete inventory	9,876		5,487		(2,395		)	(70		)	12,898
Valuation allowance on deferred tax assets	—		3,970		—			—			3,970