Debt instrument additional interest rate stated percentage rate.

No definition available.

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- Definition

Deb tInstrument Maturity Year

+ References

No definition available.

+ Details

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- Definition

Debt instrument, redemption price.

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument Repurchase Price Percentage On Principal Amount Plus Accrued And Unpaid Interest Following change Of Control

+ References

No definition available.

+ Details

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

- Definition

Debt Purchase Price Percent Of Principal Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Services Coverage Ratio

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum consolidated leverage ratio ceiling.

+ References

No definition available.

+ Details

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- Definition

Maximum consolidated senior secured leverage ratio.

+ References

No definition available.

+ Details

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- Definition

Maximum period for redemption on senior note.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Minimum amount outstanding after redemption.

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum consolidated interest coverage ratio floor.

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage redeemable.

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Redemption price percentage of senior note.

+ References

No definition available.

+ Details

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Namespace Prefix:	bas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Secured Revolving Credit Facility

+ References

No definition available.

+ Details

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

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Balance Type:	debit
Period Type:	instant

- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number APB14-1

-Paragraph 31

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

+ Details

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: 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(a)(2))

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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- Definition

Increase for additional borrowings on the credit facility during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

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- Definition

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

+ 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 210.5-02.19(b),22(b))

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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 19

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Long-Term Debt (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		6 Months Ended				0 Months Ended	6 Months Ended				6 Months Ended
	Jun. 30, 2013 item	Jun. 15, 2011	Jun. 30, 2013 Alternate Base Rate Loans Minimum [Member]	Jun. 30, 2013 Alternate Base Rate Loans Maximum [Member]	Jun. 30, 2013 Eurodollar Loans Minimum [Member]	Jun. 30, 2013 Eurodollar Loans Maximum [Member]	Jun. 13, 2011 7.75% Senior Notes due 2019	Jun. 30, 2013 7.75% Senior Notes due 2019	Dec. 31, 2011 7.75% Senior Notes due 2019 Maverick Companies	Feb. 15, 2011 7.75% Senior Notes Due 2019 on and after February 15 2015	Feb. 15, 2011 7.75% Senior Notes Due 2019 Prior To February 15 2014	Jun. 30, 2013 7.75% Senior Notes Due 2022	Jun. 30, 2013 11.625% Senior Notes Due 2014	Jun. 30, 2013 7.125% Senior Notes Due 2016
Debt Instrument [Line Items]
Issuance of senior notes							$ 200.0	$ 275.0					$ 464.6
Interest rate								7.75%				7.75%	11.625%	7.125%
Debt Instrument, Maturity Date								Feb. 15, 2019				Oct. 15, 2022
Deb tInstrument Maturity Year													2014	2016
Senior notes, aggregate principal amount							475.0					300.0
Debt instrument, purchase price as a percentage of principal amount							101.00%	100.00%
Portion of the net proceeds from the offering to be funded									186.3
Debt instrument, redemption price								100.00%				100.00%
Percent redeemable								35.00%				35.00%
Redemption price percentage of senior note								107.75%				107.75%
Minimum amount outstanding after redemption								65.00%				65.00%
Maximum period for redemption on senior note (in days)								90 days				90 days
Debt instrument, repurchase price, percentage on principal amount plus accrued and unpaid interest								101.00%				101.00%
Secured revolving credit facility	250.0	225.0								165.0	30.0
Increase in total credit	100.0
Marginal interest rate			1.50%	2.25%	2.50%	3.25%
Commitment fee	0.50%
Minimum consolidated interest coverage ratio floor	2.50
Maximum consolidated leverage ratio ceiling	1.00
Maximum consolidated senior secured leverage ratio	4.00
Borrowings outstanding	22.5
Total Available Credit under the agreement	$ 227.5
Minimum Debt service coverage ratio	1.05