Name:	bxs_LoanConcentrationsAbstract
Namespace Prefix:	bxs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Reflects the net carrying amount of agricultural real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableAgriculturalNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of commercial and industrial-owner occupied real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableCommercialAndIndustrial-OwnerOccupiedNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of commercial real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableCommercialRealEstateNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of construction, acquisition and development real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableConstructionAcquisitionAndDevelopmentNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of consumer mortgage real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableConsumerMortgagesNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all agricultural real estate loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountAgricultural
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all commercial and industrial-owner occupied real estate loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountCommercialAndIndustrial-OwnerOccupied
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all construction, acquisition and development real estate loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountConstructionAcquisitionAndDevelopment
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all consumer mortgage loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountConsumerMortgages
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all home equity loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountHomeEquity
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all commercial real estate loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableGrossCarryingAmountRealEstateCommercial
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of home equity real estate loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

No definition available.

+ Details

Name:	bxs_LoansAndLeasesReceivableHomeEquityNetOfDeferredIncome
Namespace Prefix:	bxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum percentage of loan concentrations that comprise the aggregate total of all loans, for any particular class.

+ References

No definition available.

+ Details

Name:	bxs_MaximumPercentageOfLoanConcentrations
Namespace Prefix:	bxs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	bxs_RealEstateNetOfDeferredIncomeAbstract
Namespace Prefix:	bxs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the net carrying amount of commercial loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on commercial loans and leases.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_LoansAndLeasesReceivableCommercialNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the net carrying amount of consumer loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on consumer loans and leases.

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableConsumerNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-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

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmountByCategoryAlternativeAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the aggregate gross carrying amount of all commercial loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on commercial loans and leases.

+ References

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5066-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCommercial
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all consumer loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on consumer loans and leases.

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmountConsumer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the aggregate gross carrying amount of all loans and leases held in portfolio, not otherwise categorized (such as commercial, consumer, or foreign), prior to deducting deferred income and the allowance for losses on loans and leases, not otherwise categorized (such as commercial, consumer, or foreign).

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmountOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

-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 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-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

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncomeAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the net carrying amount of loans and leases held in portfolio, not otherwise defined in the taxonomy, after deducting deferred income, but before deducting the allowance for losses on such loans and leases.

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableOtherNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_RealEstateAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration