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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
SCHEDULE II
VALUATION AND QUALIFYING ACCOUNTS
(dollars in thousands)
Accounts Receivable Allowance for Doubtful Accounts
 
Balance at
Beginning
of Year
 
Charged to
Expense
 
Additions/
(Deductions) (1)
 
Balance at
End of
Year
2014
 
$
11,741

 
$
301

 
$
1,426

 
$
13,468

2013
 
11,172

 
5,514

 
(4,945
)
 
11,741

2012
 
10,969

 
229

 
(26
)
 
11,172


______________________________
(1)
Primarily accounts receivable written off during the period.