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Acquired Loans Part 3 (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 USD ($) CreditRiskGrade | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning | $ 12,059 | $ 9,636 |
Provision for loan losses, acquired loans | 1,172 | 3,847 |
Loans charged-off | (3,018) | (3,017) |
Recoveries | 2,416 | 713 |
Net (charge-offs) recoveries | (602) | (2,304) |
Balance, ending | $ 12,629 | 11,179 |
Number of individual credit risk grades | CreditRiskGrade | 10 |  |
Nonaccrual loans not accounted for under FASB ASC Topic 310 30 | $ 1,600 |  | $ 1,100
Covered Loans [Member] |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning | 1,518 | 2,387 |
Provision for loan losses, acquired loans | (404) | (52) |
Loans charged-off | (450) | (865) |
Recoveries | 38 | (61) |
Net (charge-offs) recoveries | (412) | (926) |
Balance, ending | 702 | 1,409 |
Noncovered Loans [Member] |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Balance, beginning | 10,541 | 7,249 |
Provision for loan losses, acquired loans | 1,576 | 3,899 |
Loans charged-off | (2,568) | (2,152) |
Recoveries | 2,378 | 774 |
Net (charge-offs) recoveries | (190) | (1,378) |
Balance, ending | $ 11,927 | $ 9,770 |

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- 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
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Namespace Prefix: | trmk_
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Balance Type: | debit
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- 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
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- 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
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- Definition Nonaccrual loans not accounted for under FASB ASC Topic 310-30. + References No definition available. + Details
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- Definition This line item represents the number of individual credit risk grades established by the entity. + References No definition available. + Details
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- 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 -URI http://asc.fasb.org/extlink&oid=49124121&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 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- 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 50 -Paragraph 2 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 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=27045933&loc=d3e13503-111538 + Details
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