SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ / shares in Units, $ in Thousands, shares in Millions							1 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($) $ / shares	Mar. 31, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) $ / shares	Sep. 30, 2014 USD ($) $ / shares	Jun. 30, 2014 USD ($) $ / shares	Mar. 31, 2014 USD ($) $ / shares	Jan. 31, 2015 $ / shares	Apr. 30, 2014 $ / shares	Oct. 31, 2013 Quarter $ / shares	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) shares	Jul. 28, 2015 USD ($)	Oct. 31, 2012 USD ($)
Class of Stock [Line Items]
Net Product Sales to Distributors, Percentage										77.00%		75.00%
Deferred Revenue, Gross	$ 28,300		$ 25,000							$ 28,300		$ 25,000
Other Deferred Costs, Net	11,800		9,800							$ 11,800		$ 9,800
Stock Repurchased and Retired During Period, Shares | shares										0.5		1.6
Stock Repurchased and Retired During Period, Value										$ 23,200		$ 80,800
Stock Repurchase Program, Remaining Authorized Repurchase Amount	600									600
Common Stock, Dividends, Per Share, Declared | $ / shares							$ 0.12	$ 0.12	$ 0.10
Payments of Dividends	$ 3,500	$ 3,500	$ 3,500	$ 3,600	$ 3,000	$ 3,000				$ 7,048	$ 6,059
Common Stock, Dividends, Per Share, Cash Paid | $ / shares	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.10	$ 0.10
Common Stock, Dividends, Per Share, Declared, Fiscal 2015, Period Three | $ / shares							0.12
Common Stock, Dividends, Per Share, Declared, Fiscal 2015, Period Four | $ / shares							$ 0.12
Dividends Declared, Number Of Quarters | Quarter									4
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 75,000									$ 75,000		$ 50,000
Common Stock [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount													$ 30,000