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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Valuation and Qualifying Accounts
FOR THE YEARS ENDED DECEMBER 31, 2012, 2011 AND 2010
(Dollars in thousands)
DESCRIPTION
BALANCE AT
BEGINNING
OF YEAR


CHARGED TO COSTS AND
EXPENSES

DEDUCTIONS1

BALANCE
AT END
OF YEAR

Allowance for doubtful accounts:
 
 
 
 
Year ended December 31, 2012
$
450

$
70

$
(70
)
$
450

Year ended December 31, 2011
$
460

$
159

$
(169
)
$
450

Year ended December 31, 2010
$
1,670

$
54

$
(1,264
)
$
460



1 
Accounts written off, net of recoveries.