VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2017

VALUATION AND QUALIFYING ACCOUNTS

VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

	For the years ended December 31, 2017, 2016 and 2015
(in thousands)	Balance at Beginning of Period		Charged to Costs and Expenses			Net (Deductions) Recoveries			Balance at End of Period
Year ended December 31, 2017
Allowance for doubtful accounts	$	2,553	$	1,441		$	477	(1)	$	4,471
Deferred tax asset valuation allowance	$	356	$	3,638	(2)	$	—		$	3,994
Reserve for obsolete or slow moving inventory	$	3,052	$	5,869		$	(5,046	) (3)	$	3,875
Year ended December 31, 2016
Allowance for doubtful accounts	$	10,605	$	6,021		$	(14,073	) (1)	$	2,553
Deferred tax asset valuation allowance	$	276	$	80	(2)	$	—		$	356
Reserve for obsolete or slow moving inventory	$	2,588	$	6,401		$	(5,937	) (3)	$	3,052
Year ended December 31, 2015
Allowance for doubtful accounts	$	15,351	$	(2,958	)	$	(1,788	) (1)	$	10,605
Deferred tax asset valuation allowance	$	2	$	274	(2)	$	—		$	276
Reserve for obsolete or slow moving inventory	$	651	$	2,272		$	(335	) (3)	$	2,588

⁽¹⁾ Net (deductions) recoveries in the allowance for doubtful accounts principally reflect the write-off of previously reserved accounts net of recoveries.

⁽²⁾ The valuation allowance for deferred tax assets is increased or decreased each year to reflect the state net operating losses, foreign tax credits and capital losses that management believes will not be utilized before they expire.

⁽³⁾ Net (deductions) recoveries in the reserve for obsolete or slow moving inventory principally reflect the write-off and/ or disposal of previously reserved inventory.