INVESTMENT IN JOINT VENTURE (Tables)

12 Months Ended

Dec. 31, 2012

Equity Method Investments and Joint Ventures [Abstract]

Schedule of investment activity of joint venture in IP services operating segment

	Year Ended December 31,
	2012			2011
Investment balance, January 1	$	2,936		$	2,265
Proportional share of net income		220			475
Unrealized foreign currency translation (loss) gain, net		(156	)		196
Investment balance, December 31	$	3,000		$	2,936

Schedule of audited summarized financial information for Internap Japan

	Year Ended December 31,
	2012		2011		2010
Current assets	$	5,192	$	6,462	$	5,372
Long-term assets		1,819		712		658
Current liabilities		1,406		1,355		1,288
Long-term liabilities		24		26		—
Net sales		10,536		11,636		10,357
Operating income		651		850		836
Net income		372		787		813