RECENT BUSINESS COMBINATIONS Dotomi, Inc. Acquisition (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	12 Months Ended	1 Months Ended
	Dec. 31, 2011	Aug. 31, 2011 Dotomi Inc [Member]	Aug. 31, 2011 Stock Options [Member] Dotomi Inc [Member]
Business Acquisition [Line Items]
Aggregate Purchase Price		$ 288,123
Business Acquisition, Cost of Acquired Entity, Cash Paid		171,800
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		7.1	0.5
Business Acquisition Equity Interest Issued or Issuable Value Assumed	6,944		6,900
Business Acquisition Unvested Restricted Stock Assumed, Shares		0.4
Business Acquisition Unvested Stock Options Assumed, Shares		0.5
Stock Issued During Period, Value, Acquisitions	109,359	109,400
Transaction Costs incurred		$ 412