Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
OPERATING ACTIVITIES
Net income	$ 13,513	$ 17,139
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,842	19,459
Stock-based compensation	523	319
Amortization of financing costs	379	349
Deferred income taxes	710	6,413
Loss (income) from equity investments	(1,020)	301
Impairment of long-lived assets, non-cash	719	50
Other, net	(44)	(804)
Changes in operating assets and liabilities:
Receivables, net	(48,127)	(53,761)
Inventories, prepaid expenses and other assets	(12,040)	(10,499)
Accounts payable and other liabilities	6,116	1,280
Deferred income	45,667	49,689
Income taxes	8,424	1,296
Net cash provided by operating activities	34,662	31,231
INVESTING ACTIVITIES
Capital expenditures	(6,106)	(12,796)
Distribution from equity investee and affiliate	4,500	0
Equity investments and advances to affiliate	0	(50,566)
Other, net	0	1,250
Net cash used in investing activities	(1,606)	(62,112)
FINANCING ACTIVITIES
Proceeds from credit facility	0	30,000
Payment of long-term debt	(166)	(156)
Reacquisition of previously issued common stock	0	(10,299)
Net cash used in financing activities	(166)	19,545
Net increase (decrease) in cash and cash equivalents	32,890	(11,336)
Cash and cash equivalents at beginning of period	78,379	110,078
Cash and cash equivalents at end of period	$ 111,269	$ 98,742