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Valuation and Qualifying Accounts and Reserves (Notes)
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts and Reserves
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Years ended December 31, 2014, 2013 and 2012
(in thousands)

Description
2014
 
2013
 
2012
Allowance for doubtful accounts:
 
 
 
 
 
Balance, beginning of period
$
170

 
225

 
225

Charged to expense
321

 
442

 
449

Accounts written off
(489
)
 
(620
)
 
(526
)
Recoveries of accounts written off
148

 
123

 
77

Balance, end of period
$
150

 
170

 
225

Reserve for litigation and claims:
 
 
 
 
 
Balance, beginning of period
$
136

 
281

 
240

Charged to expense
71

 
220

 
118

Revision to accrual, due to settlements
(5
)
 
(105
)
 
(38
)
Payments
(69
)
 
(260
)
 
(39
)
Balance, end of period
$
133

 
136

 
281