Schedule II - Valuation Accounts

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation Accounts

Schedule II

Valuation Accounts

Allowance for Doubtful Accounts

(in thousands)

	Fiscal Year Ended December 31,
	2017			2016			2015
Balance at beginning of period	$	1,069		$	988		$	2,153
Additions—charged to expense	290			1,107			1,344
Deductions—bad debts written off, net of recoveries	(550		)	(1,026		)	(2,509		)
Balance at end of period	$	809		$	1,069		$	988