XML 106 R41.htm IDEA: XBRL DOCUMENT
v2.4.1.9

FDIC Indemnification Asset (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
FDIC Indemnification Asset [Abstract] |
Changes in FDIC indemnification asset | For the years ended December 31, 2014, 2013 and 2012, changes in the FDIC indemnification asset were as follows ($ in thousands):
|  | 2014 |  |  | 2013 |  |  | 2012 |
Balance at beginning of period |  | $ | 14,347 |  |  | $ | 21,774 |  |  | $ | 28,348 |
(Amortization) Accretion |  |  | (2,074 | ) |  |  | (2,469 | ) |  |  | 245 |
Transfers to FDIC claims |  |  | (4,443 | ) |  |  | (851 | ) |  |  | (2,544 | )
Change in expected cash flows |  |  | (517 | ) |  |  | (3,472 | ) |  |  | (3,761 | )
Change in FDIC true-up provision |  |  | (316 | ) |  |  | (635 | ) |  |  | (514 | )
Balance at end of period |  | $ | 6,997 |  |  | $ | 14,347 |  |  | $ | 21,774 |

X
- Definition Tabular disclosure of the changes in the FDIC indemnification asset. + References No definition available. + Details
Name: | trmk_ChangesInFdicIndemnificationAssetTableTextBlock
Namespace Prefix: | trmk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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