XML 41 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Acquired Loans Part 2 (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Carrying Value of Acquired Loans [Abstract] |  |  |  |
Carrying value, beginning | $ 76,302 |  |  |
Accretion to interest income | 9,045 |  |  |
Carrying value, ending | 143,270 |  |  |
Acquired Impaired [Member] | Covered Loans [Member] |  |  |  |
Carrying Value of Acquired Loans [Abstract] |  |  |  |
Carrying value, beginning | 72,131 |  | 0 |
Loans acquired | 0 | [1] | 93,940 |
Accretion to interest income | 6,359 |  | 4,347 |
Payments received, net | (19,994) |  | (25,764) | [2]
Other | 1,822 |  | 110 |
Less allowance for loan losses, acquired loans | (3,024) |  | (502) |
Carrying value, ending | 57,294 |  | 72,131 |
Acquired Impaired [Member] | Noncovered Loans [Member] |  |  |  |
Carrying Value of Acquired Loans [Abstract] |  |  |  |
Carrying value, beginning | 4,350 | [3] | 0 | [3]
Loans acquired | 91,987 | [1],[3] | 9,468 | [3]
Accretion to interest income | 2,686 | [3] | 349 | [3]
Payments received, net | (20,820) | [3] | (5,076) | [2],[3]
Other | 268 | [3] | (391) | [3]
Less allowance for loan losses, acquired loans | (817) | [3] | 0 | [3]
Carrying value, ending | 77,654 | [3] | 4,350 | [3]
Acquired Not ASC 310-30 [Member] | Covered Loans [Member] |  |  |  |
Carrying Value of Acquired Loans [Abstract] |  |  |  |
Carrying value, beginning | 4,171 | [4] | 0 | [4]
Loans acquired | 0 | [1],[4] | 3,830 | [4]
Accretion to interest income | 167 | [4] | 543 | [4]
Payments received, net | (683) | [4] | (202) | [2],[4]
Other | 28 | [4] | 0 | [4]
Less allowance for loan losses, acquired loans | 0 | [4] | 0 | [4]
Carrying value, ending | 3,683 | [4] | 4,171 | [4]
Acquired Not ASC 310-30 [Member] | Noncovered Loans [Member] |  |  |  |
Carrying Value of Acquired Loans [Abstract] |  |  |  |
Carrying value, beginning | 13 | [3],[4] | 0 | [3],[4]
Loans acquired | 5,927 | [1],[3],[4] | 176 | [3],[4]
Accretion to interest income | 128 | [3],[4] | 4 | [3],[4]
Payments received, net | (1,331) | [3],[4] | (47) | [2],[3],[4]
Other | (98) | [3],[4] | (120) | [3],[4]
Less allowance for loan losses, acquired loans | 0 | [3],[4] | 0 | [3],[4]
Carrying value, ending | $ 4,639 | [3],[4] | $ 13 | [3],[4]
[1] | Fair value of loans acquired from Bay Bank on March 16, 2012.
[2] | Includes $4.3 million for loan recoveries and an adjustment to payments recorded for covered acquired impaired loans, which was reported as "Changes in expected cash flows" at December 31, 2011.
[3] | Acquired noncovered loans were included in LHFI at December 31, 2011.
[4] | "Acquired Not ASC 310-30" loans consist of revolving credit agreements that are not in scope for FASB ASC Topic 310-30.

X
- Definition The value of acquired loans net of the allowance for loan losses. + References No definition available. + Details
Name: | trmk_AcquiredLoansNetOfAllowanceForLosses
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The increases or decreases in the aggregate excess of a loan's other changes over the investor's initial investment in the loan. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were 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 No definition available. + Details
Name: | trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldOther
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents changes in interest cash flows for 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, due to the impact of modifications incorporated into the quarterly assessment of expected future cash flows and/or changes in interest rates on variable rate loans. + References No definition available. + Details
Name: | trmk_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net payments received during the period on purchased loans. Monetary Duration Credit + References No definition available. + Details
Name: | trmk_ChangeInCarryingAmountOfLoansPaymentsReceivedNet
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total fair value of loans acquired, including covered and non covered. + References No definition available. + Details
Name: | trmk_LoansAcquiredFairValue
Namespace Prefix: | trmk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were 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 AICPA -Name Statement of Position (SOP) -Number 03-3 -Paragraph 16 -Subparagraph a(2) -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 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6891207&loc=d3e13503-111538 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration