ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Cost Reclassifications and Corrections (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cost of revenue	$ 242,249	$ 190,856	$ 187,922
Gross profit	317,906	239,942	234,801
Selling and marketing expense	65,996	45,750	53,719
Amortization of intangible assets acquired in business combinations	16,646	13,089	13,128
As Reported [Member]
Cost of revenue		116,802	116,509
Gross profit		313,996	306,214
Selling and marketing expense		112,282	118,457
Amortization of intangible assets acquired in business combinations		20,611	19,803
Cost Reclassification [Member]
Cost of revenue		66,532	64,738
Gross profit		(66,532)	(64,738)
Selling and marketing expense		(66,532)	(64,738)
Amortization of intangible assets acquired in business combinations		0	0
Amortization Correction [Member]
Cost of revenue		7,522	6,675
Gross profit		(7,522)	(6,675)
Selling and marketing expense		0	0
Amortization of intangible assets acquired in business combinations		(7,522)	(6,675)
Adjusted [Member]
Cost of revenue		190,856	187,922
Gross profit		239,942	234,801
Selling and marketing expense		45,750	53,719
Amortization of intangible assets acquired in business combinations		$ 13,089	$ 13,128