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NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Allowance for Credit Losses on Financing Receivables
The table below summarizes movements in qualifying accounts for the years ended December 31, 2014, 2013 and 2012:
 
 
Balance at
Beginning of
Period 
 
Charged to Costs
and Expenses 
 
Deductions/
Other 
 
Balance at End of Year 
Allowance for Doubtful Accounts (Billed and Unbilled):
 
 
 
 
 
 
 
 
Fiscal Year 2012
 
$
2,250

 
$
1,244

 
$
(1,291
)
 
$
2,203

Fiscal Year 2013
 
2,203

 
619

 
(1,022
)
 
1,800

Fiscal Year 2014
 
1,800

 
1,325

 
(944
)
 
2,181