Financing Arrangements (Details) (USD $)	0 Months Ended	9 Months Ended	12 Months Ended										3 Months Ended		0 Months Ended		12 Months Ended									9 Months Ended
	Feb. 02, 2012	Jul. 31, 2013	Oct. 31, 2013	Oct. 31, 2012	Jun. 04, 2013 Lender One [Member] Revolving Credit Facility [Member]	Apr. 01, 2013 Lender One [Member] Revolving Credit Facility [Member]	Mar. 31, 2013 Lender One [Member] Revolving Credit Facility [Member]	Dec. 26, 2012 Lender One [Member] Revolving Credit Facility [Member]	Jan. 31, 2012 Lender One [Member] Revolving Credit Facility [Member]	Apr. 19, 2011 Lender One [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Lender Two [Member] Revolving Credit Facility [Member]	Oct. 25, 2013 Lender Two [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Lender Two [Member] Minimum [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Lender Two [Member] Maximum [Member] Revolving Credit Facility [Member]	Dec. 26, 2013 London Interbank Offered Rate (LIBOR) [Member] Lender One [Member] Revolving Credit Facility [Member]	Dec. 24, 2012 London Interbank Offered Rate (LIBOR) [Member] Lender One [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Lender One [Member] Minimum [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Lender One [Member] Maximum [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Base Rate [Member] Lender One [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Base Rate [Member] Lender One [Member] Minimum [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Base Rate [Member] Lender One [Member] Maximum [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Prime Rate [Member] Lender Two [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Eurodollar [Member] Lender Two [Member] Revolving Credit Facility [Member]	Oct. 31, 2013 Equipment Security Note [Member]	Oct. 31, 2012 Equipment Security Note [Member]	Jul. 31, 2013 Insurance Financing Agreement [Member]	Oct. 31, 2013 Insurance Financing Agreement [Member]	Oct. 31, 2012 Insurance Financing Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period			2.06%	2.82%
Maximum Borrowing Capacity					$ 175,000,000			$ 120,000,000	$ 80,000,000	$ 80,000,000		$ 300,000,000
Line of Credit Increase Maximum					255,000,000			200,000,000		120,000,000		100,000,000
Determination by the Admin Agent of the Lending Syndicate		51.00%
Dividends Payable, Date Declared	Feb. 01, 2012
Debt Instrument, Basis Spread on Variable Rate															1.50%	2.50%	1.50%	2.50%	0.00%	0.00%	1.00%	0.50%	1.00%
Line of Credit Facility, Covenant, Leverage Ratio, Minimum							2.25
Debt Instrument, Covenant, Leverage Ratio, Maximum						2.85
Debt Instrument, Covenant, Fixed Charge Ratio, Minimum						2.00	2.50
Document Period End Date		Oct. 31, 2013	Oct. 31, 2013
Line of Credit Facility, Commitment Fee Percentage													0.20%	0.35%
Letters of Credit Outstanding, Amount			2,441,000
Line of Credit Facility, Remaining Borrowing Capacity											180,159,000
Collateral Agreement			65.00%
Debt Instrument, Interest Rate, Stated Percentage																								2.47%			2.15%
Debt Instrument, Periodic Payment																								44,000		68,000
Short-term Debt																											405,000	447,000
Equipment security note																								2,461,000	0
Equipment Security Note, Short-Term Portion																								477,000
Equipment Security Note, Long-term Portion			$ (119,384,000)	$ (21,150,000)																				$ (1,984,000)