Name:	bxs_DaysPastDueOfPrincipalOrInterestAtWhichLoansAndLeasesMayBePlacedInNonAccrualStatus
Namespace Prefix:	bxs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

Recorded investment in loans and leases that have been restructured because of the borrower's weakened financial condition.

No definition available.

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

Total nonperforming loans include financing receivables that are 90 days or more past due and still accruing, restructured loans and leases which are still accruing and the recorded investment in financing receivables that are on nonaccrual status.

No definition available.

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

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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

Name:	bxs_PortfolioSegmentsAxis=bxs_RealEstateSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	bxs_PortfolioSegmentsAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	bxs_PortfolioSegmentsAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: