Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Feb. 01, 2015
Assets:
401(k) mirror plan assets	$ 2,158	$ 2,496
Liabilities:
Commodity futures contracts		1,811
Agricultural Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts		874
Gasoline Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts		937
Recurring [Member] | Level 1 [Member]
Assets:
401(k) mirror plan assets	$ 2,158	2,496
Liabilities:
Commodity futures contracts		1,811
Recurring [Member] | Level 1 [Member] | Agricultural Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts		874
Recurring [Member] | Level 1 [Member] | Gasoline Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts		$ 937
Recurring [Member] | Level 2 [Member]
Assets:
401(k) mirror plan assets
Liabilities:
Commodity futures contracts
Recurring [Member] | Level 2 [Member] | Agricultural Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts
Recurring [Member] | Level 2 [Member] | Gasoline Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts
Recurring [Member] | Level 3 [Member]
Assets:
401(k) mirror plan assets
Liabilities:
Commodity futures contracts
Recurring [Member] | Level 3 [Member] | Agricultural Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts
Recurring [Member] | Level 3 [Member] | Gasoline Commodity Futures Contracts [Member]
Liabilities:
Commodity futures contracts