Long-Term Debt Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Debt Disclosure [Abstract]
Interest expense	$ 4,087	$ 4,125	$ 8,161	$ 8,238
Less: capitalized interest	1,485	1,422	4,091	2,402
Net interest expense	$ 2,602	$ 2,703	$ 4,070	$ 5,836