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CREDIT ARRANGEMENTS (Narrative) (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 29, 2016 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2012 USD ($)	Nov. 30, 2016 PLN	Nov. 30, 2016 USD ($)	Aug. 31, 2016 PLN	Aug. 31, 2016 USD ($)	Aug. 31, 2014 USD ($)	May 31, 2013 USD ($)	May 31, 2011	May 31, 2010	Aug. 31, 2008 USD ($)	Jul. 31, 2007 USD ($)
Debt Instrument [Line Items]
Net proceeds from termination of interest rate swaps				$ 52,700,000
Unamortized deferred gain on termination of interest rate swaps						$ 9,800,000		$ 11,600,000
Amortization of interest rate swaps termination gain		$ (1,899,000)	$ (1,899,000)
Interest capitalized		1,600,000	500,000
Interest paid		8,400,000	$ 9,000,000
CMCP
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity					PLN 175,000,000	41,600,000.0	PLN 175,000,000	44,800,000.0
Total borrowing		0
Total payments		$ 0
2023 Notes
Debt Instrument [Line Items]
Debt instrument, face amount										$ 330,000,000
Debt instrument, interest rate, stated percentage										4.875%
Debt instrument, maturity date		May 15, 2023
2018 Notes
Debt Instrument [Line Items]
Debt instrument, face amount													$ 500,000,000
Debt instrument, interest rate, stated percentage													7.35%
Debt instrument, maturity date		August 2018
Debt instrument, effective interest rate												6.40%
Debt repurchased as a result of cash tender offer	$ 100,200,000
2017 Notes
Debt Instrument [Line Items]
Debt instrument, face amount														$ 400,000,000
Debt instrument, interest rate, stated percentage														6.50%
Debt instrument, maturity date		July 2017
Debt instrument, effective interest rate											5.74%
Debt repurchased as a result of cash tender offer	$ 100,000,000
Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity									$ 350,000,000
Revolving credit facility, maturity date		Jun. 26, 2019
Revolving credit facility, maximum borrowing capacity									500,000,000
Revolving credit facility, amount drawn						0		$ 0
Minimum interest coverage ratio		2.50
Maximum debt to capitalization ratio		0.60
Minimum liquidity required						$ 150,000,000
Actual interest coverage ratio					4.84	4.84
Actual debt to capitalization ratio					0.44	0.44
Stand-by letters of credit
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity									$ 50,000,000
Stand by letters of credit outstanding amount						$ 3,000,000

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