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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
Years Ended December 31, 2018, 2017, and 2016
(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, 2018

$23

 
—

 

($15
)
 

$8

Year ended December 31, 2017
33

 
—

 
(10
)
 
23

Year ended December 31, 2016
42

 
—

 
(9
)
 
33

 
 
 
 
 
 
 
 
Deferred tax asset valuation allowance:
 
 
 
 
 
 
 
Year ended December 31, 2018

$34,889

 

$3,950

(a)
—

 

$38,839

Year ended December 31, 2017
21,861

 
13,028

(a)
—

 
34,889

Year ended December 31, 2016
18,248

 
3,613

(a)
—

 
21,861

 
 
 
 
 
(a)
The 2018, 2017 and 2016 increase is comprised of valuation allowance against the TRS deferred tax assets.