SHAREHOLDER'S EQUITY (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Conversion Of Class B Common Stock [Abstract]
Shares contributed to charitable organizations		170,000	90,000
Credit Facility	$ 425,000,000
Dividends And Shares Activitiy [Line Items]
Dvidend Equivalent liability - short term	0	52,000
Dvidend Equivalent liability - long term	221,000	228,000
Total Dividend Equivalent Liability	221,000	280,000
Dividend payments	0	0	0
Tax benefit recognized to paid-in capital	0	0	0
Shares of stock deemed repurchased	199,000	297,000	182,000
Amount recorded as financing activity	(1,367,000)	(3,057,000)	(1,628,000)
The total cost to repurchase	0	0	0
Dividend Equivalents Paid	43,000	512,000	874,000
Credit Facility Available For Dividend Equity Or Debt Repurchase	$ 40,000,000