Short-term Borrowing and Long-term Debt - Additional Information (Detail) (USD $)	9 Months Ended			9 Months Ended			9 Months Ended		0 Months Ended	9 Months Ended		3 Months Ended		0 Months Ended				9 Months Ended	0 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Feb. 01, 2014	Nov. 01, 2014 Bonds [Member]	Feb. 01, 2014 Bonds [Member]	Nov. 01, 2014 Affiliated Entity [Member]	Nov. 01, 2014 PGP Florence, LLC [Member] Protective Life Insurance Company [Member]	Jul. 18, 2013 PGP Florence, LLC [Member] Protective Life Insurance Company [Member]	May 30, 2014 PGP Gardendale, LLC [Member] Protective Life Insurance Company [Member]	Nov. 01, 2014 PGP Gardendale, LLC [Member] Protective Life Insurance Company [Member]	May 30, 2014 PGP Gardendale, LLC [Member] Protective Life Insurance Company [Member]	Nov. 01, 2014 PGP Fayetteville, LLC [Member] Protective Life Insurance Company [Member]	Aug. 18, 2014 PGP Fayetteville, LLC [Member] Protective Life Insurance Company [Member]	Jun. 28, 2013 Revolving Credit Facility [Member]	Nov. 01, 2014 Revolving Credit Facility [Member]	Feb. 01, 2014 Revolving Credit Facility [Member]	Nov. 01, 2014 Revolving Credit Facility [Member] LIBOR [Member]	Nov. 01, 2014 Revolving Credit Facility [Member] Prime Rate [Member]	Jun. 28, 2013 Revolving Credit Facility [Member] Minimum [Member] LIBOR [Member]	Jun. 28, 2013 Revolving Credit Facility [Member] Minimum [Member] Prime Rate [Member]	Jun. 28, 2013 Revolving Credit Facility [Member] Maximum [Member] LIBOR [Member]	Jun. 28, 2013 Revolving Credit Facility [Member] Maximum [Member] Prime Rate [Member]	Nov. 01, 2014 Letter of Credit [Member]	Feb. 01, 2014 Letter of Credit [Member]	Nov. 01, 2014 Letter of Credit [Member] Bonds [Member]	Nov. 01, 2014 Swing Line Loans [Member]	May 30, 2014 Loan Agreement with Protective Life Insurance [Member] PGP Gardendale, LLC [Member] Protective Life Insurance Company [Member]
Debt Instrument [Line Items]
Date of entrance into credit facility	Mar. 21, 2011
Credit facility, maximum principal amount	$ 150,000,000.0																						$ 35,000,000.0			$ 15,000,000.0
Credit facility, maximum borrowing capacity increased	200,000,000.0
Borrowing under revolving credit facility maturity date	Mar. 21, 2016
Credit facility restated maturity date														Jun. 27, 2018
Line of credit facilities interest at variable rate																		3.25%	1.50%	0.50%	2.00%	1.00%
Credit facility restated commitment fee amount														0.25%
Maximum amount available under credit facility	144,100,000
Weighted average of short term debt															1.87%
Fair value measurements outstanding under revolving line of credit															44,600,000	18,700,000	44,000,000	600,000
Loan agreement amount outstanding				4,300,000	4,300,000			12,600,000			17,300,000		3,200,000										6,800,000	6,800,000	4,300,000
Maximum outstanding borrowing	51,000,000
Average outstanding borrowing	42,300,000
Interest rate on bonds				1.25%	1.25%
Bonds repurchase date	Mar. 13, 2016
Subsidiaries maximum bond liability						5,880,000
Maturity date of debt				Dec. 01, 2019			Aug. 01, 2033			Jun. 01, 2034		Sep. 01, 2029
Fixed interest rate of loan								4.00%		5.00%			4.625%
Outstanding loan amount							12,100,000			5,000,000		3,200,000
Loan classified as short term	45,236,000		19,107,000				400,000					200,000
Proceeds from the issuance of long-term debt	8,215,000	13,211,000							5,000,000
Holdback agreement additional funding amount																											12,300,000
Holdback agreement revised additional funding amount										10,000,000
Incremental funding, remaining balance										$ 10,000,000