Investments (Held-To-Maturity Securities) (Details) - State and municipal bonds [Member] - USD ($) $ in Thousands	Jul. 30, 2016	Jan. 30, 2016
Contractual maturities of held-to-maturity securities, at amortized cost:
Less than 1 year, Amortized Cost	$ 38,612
1 - 5 years, Amortized Cost	10,727
Held-to-Maturity Securities, Amortized Cost	49,339
Contractual maturities of held-to-maturity securities, at fair values:
Less than 1 year, Fair Value	38,672
1 - 5 years, Fair Value	10,738
Held-to-Maturity Securities, Estimated Fair Value	$ 49,410	$ 50,123