Amendments to line of credit agreements fees percent.

No definition available.

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- Definition

Amendments to line of credit agreements maturity date.

+ References

No definition available.

+ Details

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- Definition

Bonds repurchased date.

+ References

No definition available.

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- Definition

Debt Instrument, Holdback Agreement, Additional Funding Amount

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Holdback Agreement, Revised Additional Funding Amount

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Incremental Funding, Remaining Balance

+ References

No definition available.

+ Details

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- Definition

Maximum liability under amended bond agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

+ Details

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- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
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- Details

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Short-term Borrowing and Long-term Debt - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	May 30, 2014	Jul. 18, 2013	Nov. 01, 2014	Aug. 18, 2014
Line of Credit Facility [Line Items]
Revolving loan to the company	$ 150,000,000.0
Maximum borrowing capacity increased	200,000,000.0
Borrowing under revolving credit facility maturity date	Mar. 21, 2016
Maximum amount available under credit facility	115,600,000
Company enter into a Credit Agreement	Mar. 21, 2011
Company's borrowing under credit facility	9,800,000us-gaap_LineOfCredit	18,700,000us-gaap_LineOfCredit
Weighted average interest rate	2.60%
Maximum outstanding borrowing	65,600,000
Average outstanding borrowing	41,000,000
Bonds repurchased date	Mar. 13, 2016
Proceeds from issuance of long term debt	8,220,000us-gaap_ProceedsFromIssuanceOfDebt	13,211,000us-gaap_ProceedsFromIssuanceOfDebt
Outstanding loan amount	12,000,000us-gaap_LongTermDebt
Affiliated Entity [Member]
Line of Credit Facility [Line Items]
Subsidiaries use maximum liability	5,880,000
Bonds [Member]
Line of Credit Facility [Line Items]
Outstanding under bonds	3,700,000	4,300,000
Interest rate on bonds	1.25%	1.25%
Maturity date of debt	Dec. 01, 2019
Protective Life Insurance Company [Member]
Line of Credit Facility [Line Items]
Outstanding under bonds				12,600,000
Maturity date of debt	Aug. 01, 2033
Fixed interest rate of loan				4.00%
Loan classified as short term	400,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Revolving loan to the company	35,000,000.0
Maximum amount available under credit facility	29,400,000
Outstanding under bonds	5,600,000	6,800,000
Letter of Credit [Member] \| Bonds [Member]
Line of Credit Facility [Line Items]
Outstanding under bonds	3,700,000
Swing Line Loans [Member]
Line of Credit Facility [Line Items]
Revolving loan to the company	15,000,000.0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility restated maturity date	Jun. 27, 2018
Credit facility restated commitment fee, percentage	0.25%
Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Line of credit facilities, spread rate for variable interest rate	1.50%
Revolving Credit Facility [Member] \| Minimum [Member] \| Prime Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facilities, spread rate for variable interest rate	0.50%
Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Line of Credit Facility [Line Items]
Line of credit facilities, spread rate for variable interest rate	2.00%
Revolving Credit Facility [Member] \| Maximum [Member] \| Prime Rate [Member]
Line of Credit Facility [Line Items]
Line of credit facilities, spread rate for variable interest rate	1.00%
PGP Gardendale, LLC [Member] \| Loans Payable [Member]
Line of Credit Facility [Line Items]
Outstanding under bonds			17,300,000
Proceeds from issuance of long term debt			5,000,000
Fixed interest rate of loan					5.00%
Outstanding loan amount	5,000,000
Loan classified as short term	100,000
Debt Instrument, Holdback Agreement, Additional Funding Amount			12,300,000
Debt Instrument, Holdback Agreement, Revised Additional Funding Amount					10,000,000.0
Debt Instrument, Incremental Funding, Remaining Balance					10,000,000.0
PGP Fayetteville, LLC [Member] \| Loans Payable [Member]
Line of Credit Facility [Line Items]
Outstanding under bonds						3,200,000
Fixed interest rate of loan						4.625%
Outstanding loan amount	3,100,000
Loan classified as short term	$ 200,000