Fair Value (Table 2) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 29, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Fair Value, Beginning balance	$ 100,534
Redemptions	(1,700)
Gains and losses, net:
Reported in Other Comprehensive Income	1,500
Fair Value, Ending Balance	100,334
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	(1,700)
Gains and losses, net:
Reported in Other Comprehensive Income	865
Fair Value, Ending Balance	84,897
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:
Reported in Other Comprehensive Income	635
Fair Value, Ending Balance	$ 15,437