BUSINESS COMBINATIONS (Schedule of Business Acquisitions, by Acquisition) (Total Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	0 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 20, 2012	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Total cash consideration	$ 15,600
Ozmo Inc. [Member]
Business Acquisition [Line Items]
Total cash consideration		58,165
Unvested shares in Ozmo		237
Transaction expenses incurred by Ozmo		1,816
Long-term debt paid on behalf of Ozmo		1,415
Fair value of contingent consideration (earn-out provision)		1,927	1,900
Liabilities assumed		861
Total purchase price		64,421
NMI [Member] [Member]
Business Acquisition [Line Items]
Cash, including cash acquired of $3.0 million				142,639
Fair value of earn-out				420
Total cash consideration				$ 143,059	$ 139,600