XML 35 R71.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Acquired Loans Part 4 (Details) (USD $) | 12 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 CreditRiskGrade | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Feb. 15, 2013
Allowance for loan loss [Abstract] |  |  |  |  |
Balance, beginning | $ 9,636,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses | $ 6,075,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses | $ 502,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses |  |
Provision for loan losses, acquired loans | 6,171,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired | 6,039,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired | 5,528,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired |  |
Loans charged-off | (6,147,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs | (4,094,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs | (371,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs |  |
Recoveries | 2,399,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries | 1,616,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries | 416,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries |  |
Net (charge-offs) recoveries | (3,748,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs | (2,478,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs | 45,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs |  |
Balance, ending | 12,059,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses | 9,636,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses | 6,075,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses | 9,636,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses |
Number of individual credit risk grades | 10 trmk_NumberOfIndividualCreditRiskGrades |  |  |  |
Nonaccrual loans not accounted for under FASB ASC Topic 310-30 | 1,100,000 trmk_NonaccrualLoansNotAccountedForUnderFasbAscTopic31030 | 2,400,000 trmk_NonaccrualLoansNotAccountedForUnderFasbAscTopic31030 |  | 2,400,000 trmk_NonaccrualLoansNotAccountedForUnderFasbAscTopic31030 |
BancTrust Financial Group, Inc. [Member] |  |  |  |  |
Allowance for loan loss [Abstract] |  |  |  |  |
Revolving credit agreements acquired |  |  |  |  | 153,900,000 trmk_RevolvingCreditAgreementsAcquired / us-gaap_BusinessAcquisitionAxis = trmk_BanctrustFinancialGroupIncMember
Decrease in acquired non covered loans as measurement period adjustment |  | 6,800,000 trmk_BusinessCombinationIncreaseDecreaseInAcquiredNonCoveredLoansAsMeasurementPeriodAdjustment / us-gaap_BusinessAcquisitionAxis = trmk_BanctrustFinancialGroupIncMember |  | 6,800,000 trmk_BusinessCombinationIncreaseDecreaseInAcquiredNonCoveredLoansAsMeasurementPeriodAdjustment / us-gaap_BusinessAcquisitionAxis = trmk_BanctrustFinancialGroupIncMember |
Covered Loans [Member] |  |  |  |  |
Allowance for loan loss [Abstract] |  |  |  |  |
Balance, beginning | 2,387,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 4,190,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 502,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |  |
Provision for loan losses, acquired loans | (978,000)us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | (1,328,000)us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 3,612,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |  |
Loans charged-off | 127,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | (460,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | (81,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |  |
Recoveries | (18,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | (15,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 157,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |  |
Net (charge-offs) recoveries | 109,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | (475,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 76,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |  |
Balance, ending | 1,518,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 2,387,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 4,190,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember | 2,387,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember |
Noncovered Loans [Member] |  |  |  |  |
Allowance for loan loss [Abstract] |  |  |  |  |
Balance, beginning | 7,249,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 1,885,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 0 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |  |
Provision for loan losses, acquired loans | 7,149,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 7,367,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 1,916,000 us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |  |
Loans charged-off | (6,274,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | (3,634,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | (290,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |  |
Recoveries | 2,417,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 1,631,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | 259,000 trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |  |
Net (charge-offs) recoveries | (3,857,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | (2,003,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | (31,000)trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |  |
Balance, ending | $ 10,541,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | $ 7,249,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | $ 1,885,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember | $ 7,249,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = trmk_NoncoveredLoansMember |

X
- Details
Name: | trmk_AllowanceForLoanLossAbstract
Namespace Prefix: | trmk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination increase decrease in acquired non covered loans as measurement period adjustment during the period. + References No definition available. + Details
Name: | trmk_BusinessCombinationIncreaseDecreaseInAcquiredNonCoveredLoansAsMeasurementPeriodAdjustment
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reduction to the allowance for certain loans acquired in transfer not accounted for as debt credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts. + References No definition available. + Details
Name: | trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesRecoveries
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reduction to the allowance for certain loans acquired in transfer not accounted for as debt credit losses related to financing receivables deemed uncollectible. + References No definition available. + Details
Name: | trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForCreditLossesWriteOffs
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net reduction to the allowance for certain loans acquired in transfer not accounted for as debt credit losses related to financing receivables deemed uncollectible. + References No definition available. + Details
Name: | trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForNetCreditLossesWriteOffs
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Nonaccrual loans not accounted for under FASB ASC Topic 310-30. + References No definition available. + Details
Name: | trmk_NonaccrualLoansNotAccountedForUnderFasbAscTopic31030
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This line item represents the number of individual credit risk grades established by the entity. + References No definition available. + Details
Name: | trmk_NumberOfIndividualCreditRiskGrades
Namespace Prefix: | trmk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revolving credit agreements acquired. + References No definition available. + Details
Name: | trmk_RevolvingCreditAgreementsAcquired
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of addition to allowance reserve for credit loss arising from purchase of loan and lease portfolios. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 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 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesLoansAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=trmk_NoncoveredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=trmk_BanctrustFinancialGroupIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |