Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Nov. 30, 2013
Valuation Allowance [Line Items]
Provision (Benefit) for income taxes	$ 45,911	$ (3,637)
Income Tax Provision		21,475
Effective Income Tax Rate, Continuing Operations	37.02%	(6.75%)
Deferred Tax Assets, Net of Valuation Allowance	337,574		376,800
Deferred Tax Assets, Valuation Allowance	12,706		12,706
Deferred Tax Assets, Operating Loss Carryforwards	55,675		88,100
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	139,887		143,600
Operating Loss Carryforwards, Valuation Allowance	10,633		10,633
Unrecognized tax benefits	10,459		10,459
Income tax penalties and interest accrued	22,304		19,124
Income tax penalties and interest accrued recorded during the period	3,183
State Deferred Tax Asset [Member]
Valuation Allowance [Line Items]
Reversal of deferred tax asset, valuation allowance		$ 25,112
Federal Net Operating Loss Carryforwards [Member]
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Expiration Dates	20
State Net Operating Loss Carryforwards Years [Member]
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Expiration Dates	2014 and 2033
State Net Operating Loss Carryforwards High End Range [Member]
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Expiration Dates	20
State Net Operating Loss Carryforwards [Member]
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Expiration Dates	5
Federal Net Operating Loss Carryforwards Year [Member]
Valuation Allowance [Line Items]
Operating Loss Carryforwards, Expiration Dates	2025