Fair Value (Table 2) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 28, 2012
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Fair Value, Beginning balance	$ 100,534
Redemptions	(2,650)
Gains and losses, net:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(13,442)
Reported in Other Comprehensive Income	15,066
Fair Value, Ending Balance	99,508
Available-for- sale ARS - Student Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Fair Value, Beginning balance	85,732
Redemptions	(2,650)
Gains and losses, net:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(8,325)
Reported in Other Comprehensive Income	9,893
Fair Value, Ending Balance	84,650
Available-for- sale ARS - Muni Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Fair Value, Beginning balance	14,802
Redemptions	0
Gains and losses, net:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(5,117)
Reported in Other Comprehensive Income	5,173
Fair Value, Ending Balance	$ 14,858