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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]  
Supplemental cash flow investing activities relating to acquisitions
The following table reflects supplemental cash flow investing activities related to the acquisitions of Blue Order and Euphonix during the year ended December 31, 2010 and the acquisition of MaxT during the year ended December 31, 2009. There was no supplemental cash flow investing activity during the year ended December 31, 2011.
 
2010
 
2009
Fair value of:
 
 
 
Assets acquired and goodwill
$
48,598

 
$
7,332

Liabilities assumed
(14,228
)
 
(2,152
)
Total consideration
34,370

 
5,180

Less: cash acquired
(1,586
)
 
(767
)
Less: equity consideration
(5,776
)
 
—

Net cash paid for acquisitions
$
27,008

 
$
4,413