ACQUISITIONS Allocation of Total Purchase Price Paid for Acquisitions (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	May. 29, 2014	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Goodwill		$ 312,725	$ 312,725		$ 295,984
Net Cash Paid			20,766	$ 2,940
NetClarity Inc and Architecture Technology Corporation [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash and Equivalents	$ 0
Current Assets, Net of Cash Acquired	63
Fixed Assets	24
Intangibles	3,928
Goodwill	0
Total Assets Acquired	4,015
Total Liabilities Assumed	59
Net Assets Acquired	3,956
Net Cash Paid	2,890
Equity Issued	1,066
Actual Cash Paid	$ 2,890
Milestone and Ponte Technology [Member]
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash and Equivalents		643	643
Current Assets, Net of Cash Acquired		1,498	1,498
Fixed Assets		155	155
Intangibles		4,834	4,834
Goodwill		16,741	16,741
Total Assets Acquired		23,871	23,871
Total Liabilities Assumed		844	844
Net Assets Acquired		23,027	23,027
Net Cash Paid			20,526
Equity Issued		$ 1,858	1,858
Actual Cash Paid			$ 21,169