Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 29, 2012	Feb. 28, 2011
OPERATING ACTIVITIES
Net income	$ 17,139	$ 21,435
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,459	19,146
Stock-based compensation	319	320
Amortization of financing costs	349	306
Deferred income taxes	6,413	10,150
Loss from equity investments	301	226
Impairment of long-lived assets, non-cash	50	2,872
Other, net	(804)	13
Changes in operating assets and liabilities:
Receivables, net	(53,761)	(77,240)
Inventories, prepaid expenses and other assets	(10,499)	(5,260)
Accounts payable and other liabilities	1,280	5,931
Deferred income	49,689	38,240
Income taxes	1,296	3,635
Net cash provided by operating activities	31,231	19,774
INVESTING ACTIVITIES
Capital expenditures	(12,796)	(11,699)
Equity investments and advances to affiliate	(50,566)	(311)
Other, net	1,250
Net cash used in investing activities	(62,112)	(12,010)
FINANCING ACTIVITIES
Payment under credit facility		(52,000)
Proceeds from credit facility	30,000
Payment of long-term debt	(156)	(149)
Proceeds from long-term debt		65,000
Deferred financing fees		(424)
Exercise of Class A common stock options		51
Reacquisition of previously issued common stock	(10,299)	(2,394)
Net cash provided by financing activities	19,545	10,084
Net increase (decrease) in cash and cash equivalents	(11,336)	17,848
Cash and cash equivalents at beginning of period	110,078	84,166
Cash and cash equivalents at end of period	$ 98,742	$ 102,014