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VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II
VALUATION AND QUALIFYING ACCOUNTS
December 31, 2018
(In thousands)
 
 
 
 
 
Additions
 
 
 
 
Description
 
Balance at
beginning of
period
 
Charged to
costs and
expenses
 
Charged
to other
accounts
 
Deductions
 
Balance at
end of
period
Allowance for Doubtful Accounts:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
 
$
26,470

 
$
30,632

 
$
2,680

 
$
(32,738
)
 
$
27,044

Year ended December 31, 2017
 
$
27,044

 
$
25,370

 
$
555

 
$
(29,857
)
 
$
23,112

Year ended December 31, 2018
 
$
23,112

 
$
17,597

 
$
7,153

 
$
(23,109
)
 
$
24,753

 
 
 
 
 
 
 
 
 
 
 
Deferred Tax Valuation Allowance:
 
 

 
 

 
 

 
 

Year ended December 31, 2016
 
$
121,602

 
$
142,862

(1) 
$
—


$
(159
)

$
264,305

Year ended December 31, 2017
 
$
264,305

 
$
71,782

(2) 
$
—

 
$
—

 
$
336,087

Year ended December 31, 2018
 
$
336,087

 
$
330

(3) 
$
—

 
$
—


$
336,417



(1)  Adjustment to valuation allowance for federal and state net operating losses and federal credits of $128,931 and $13,931, respectively.

(2)  Adjustment to valuation allowance for federal and state net operating losses of $294,568 and a reduction of $222,786 resulting from the Tax Cuts and Jobs Act.

(3)  Reduction of valuation allowance for federal and state net operating losses and federal credits of $5,919 off-set by additional valuation allowance for federal credits of $207 and adjustments resulting from the Tax Cuts and Jobs Act of $6,042.