SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Common Stock Repurchases and Common Stock Dividend) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended		3 Months Ended								6 Months Ended		1 Months Ended		3 Months Ended	6 Months Ended	8 Months Ended
	Oct. 31, 2010 quarters	Jan. 31, 2010 quarters	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Jun. 30, 2011	Jun. 30, 2010	Feb. 28, 2011 Common Stock [Member]	May 31, 2009 Common Stock [Member]	Jun. 30, 2011 Common Stock [Member]	Jun. 30, 2010 Common Stock [Member]	Dec. 31, 2009 Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount													$ 50,000,000	$ 25,000,000
Stock Repurchased and Retired During Period, Shares															0.1	0.4	0.5
Stock Repurchased and Retired During Period, Value															4,400,000	14,000,000	11,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount															45,600,000
Dividends Declared, Number Of Quarters	4	4
Common Stock, Dividends, Per Share, Declared			$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05
Payments of Dividends					$ 1,400,000	$ 1,400,000	$ 1,400,000	$ 1,400,000	$ 1,400,000	$ 1,400,000	$ 2,885,000	$ 2,768,000