ACCRUED LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2011

ACCRUED LIABILITIES

Schedule of the Company's accrued liabilities

	December 31,
	2010		2011
Accrued liabilities consist of:
Bonuses and accrued vacation	$	7,098	$	4,881
Auditing and consulting services		1,274		789
Tax contingencies and accruals for unrecognized income tax benefits		10,303		6,498
Accruals for acquisitions		6,777		—
Accrued equity-based incentive awards		3,933		4,487
Other accrued liabilities		4,218		4,671
Total accrued liabilities	$	33,603	$	21,326