CAPITAL STOCK, Stock Option Purchase (Details) (USD $)	12 Months Ended			3 Months Ended		3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2009 Options with Exercise Price Equal to or Greater than 40 Dollars [Member]	Dec. 31, 2011 Options with Exercise Price Equal to or Greater than 40 Dollars [Member]	Jun. 30, 2009 Options with Exercise Price Equal to or Greater than 50 Dollars [Member]	Jun. 30, 2009 Options with Exercise Price Equal to or Less Than 50 Dollars [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding stock options eligible for tender offer (in shares)					547,133
Option exercise price, minimum (in dollars per share)				$ 40.00		$ 50.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit							$ 50.00
Cash tender offer to repurchase options (in dollars per share)				$ 1.50		$ 1.00
Total underlying shares of options tendered under the offer (in shares)				419,042
Underling shares of options available for future grant tendered under the offer (in shares)				366,769
Payments related to stock option purchase	$ 0	$ 0	$ (526,000)	$ (500,000)
Stock-based compensation charges				$ 100,000