Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS

Years Ended December 31, 2017, 2016, and 2015

(In Thousands)

Description	Balance at Beginning of Year		Additions Charged to Cost and Expenses			Deductions		Balance at End of Year
Allowance for doubtful accounts:
Year ended December 31, 2017		$33	—			(10	)		$23
Year ended December 31, 2016	42		—			(9	)	33
Year ended December 31, 2015	42		—			—		42
Deferred tax asset valuation allowance:
Year ended December 31, 2017		$21,861		$13,028	(a)	—			$34,889
Year ended December 31, 2016	18,248		3,613		(a)	—		21,861
Year ended December 31, 2015	13,644		4,604		(b)	—		18,248

(a) The 2017 and 2016 increase is comprised of valuation allowance against the TRS deferred tax assets.

(b) The 2015 increase is comprised of valuation allowance against the TRS deferred tax assets and the CBPC provision to return adjustment.