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Accounts Receivable, Net (Tables)
 6 Months Ended
Jun. 30, 2014
Receivables [Abstract]  
Schedule of accounts receivable, net
Accounts receivable, net consists of the following:
 
June 30, 2014
 
December 31, 2013
Trade receivables
$
65,955

 
$
66,224

Unbilled revenue
4,984

 
4,836

Other receivables
2,383

 
1,973

 
73,322

 
73,033

Less: Allowance for doubtful accounts
(249
)
 
(180
)
Accounts receivable, net
$
73,073

 
$
72,853
Impact of operating income
Cumulative catch-up adjustments had the following impacts to operating income for the periods presented:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2014
2013
 
2014
2013
Favorable adjustments
$
820

$
108

 
$
290

$
106

Unfavorable adjustments
(234
)
(1,108
)
 
(228
)
(1,178
)
Net unfavorable operating income adjustments
$
586

$
(1,000
)
 
$
62

$
(1,072
)