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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule II
Valuation and Qualifying Accounts
 
 
Balance at
beginning
of period
 
Additions
charged to
costs and
expenses
 
Deductions (1)
 
Other (2)
 
Balance at
end of
period
Allowance for doubtful accounts
 
 
 
 
 
 
 
 
 
2014
$
1,060

 
$
8

 
$
(200
)
 
$
—

 
$
868

2013
$
760

 
$
369

 
$
(69
)
 
$
—

 
$
1,060

2012
$
1,130

 
$
—

 
$
(370
)
 
$
—

 
$
760

Valuation allowance
 
 
 
 
 
 
 
 
 
2014
$
1,357

 
$
19,506

 
$
—

 
$
8,009

 
$
28,872

2013
$
—

 
$
509

 
$
—

 
$
848

 
$
1,357

2012
$
—

 
$
—

 
$
—

 
$
—

 
$
—

(1) Deductions column represents the reversal of additions previously charged to costs and expenses and uncollectible accounts written off, net of recoveries.
(2) Additions represent valuation allowance adjustments recorded as part of the purchase accounting allocation related to the SignalDemand and Cameleon acquisitions.