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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2014
Shareholders' Equity [Abstract] |
Table of actual regulatory capital amounts and ratios | The following table provides Trustmark's and TNB's actual regulatory capital amounts and ratios for the periods presented under regulatory capital standards then in effect ($ in thousands):
|  |  |  |  |  |  |  | Minimum Regulatory |
|  | Actual |  |  | Minimum Regulatory |  |  | Provision to be |
|  | Regulatory Capital |  |  | Capital Required |  |  | Well-Capitalized |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
At December 31, 2014: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,221,292 |  |  |  | 14.56 | % |  | $ | 671,024 |  |  |  | 8.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 1,198,697 |  |  |  | 14.32 | % |  |  | 669,856 |  |  |  | 8.00 | % |  | $ | 837,320 |  |  |  | 10.00 | %
Tier 1 Capital (to Risk Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,129,630 |  |  |  | 13.47 | % |  | $ | 335,512 |  |  |  | 4.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 1,108,399 |  |  |  | 13.24 | % |  |  | 334,928 |  |  |  | 4.00 | % |  | $ | 502,392 |  |  |  | 6.00 | %
Tier 1 Capital (to Average Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,129,630 |  |  |  | 9.63 | % |  | $ | 469,411 |  |  |  | 4.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 1,108,399 |  |  |  | 9.46 | % |  |  | 468,783 |  |  |  | 4.00 | % |  | $ | 585,979 |  |  |  | 5.00 | %
At December 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,122,904 |  |  |  | 14.18 | % |  | $ | 633,310 |  |  |  | 8.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 1,076,391 |  |  |  | 13.74 | % |  |  | 626,672 |  |  |  | 8.00 | % |  | $ | 783,340 |  |  |  | 10.00 | %
Tier 1 Capital (to Risk Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,026,858 |  |  |  | 12.97 | % |  | $ | 316,655 |  |  |  | 4.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 982,925 |  |  |  | 12.55 | % |  |  | 313,336 |  |  |  | 4.00 | % |  | $ | 470,004 |  |  |  | 6.00 | %
Tier 1 Capital (to Average Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trustmark Corporation |  | $ | 1,026,858 |  |  |  | 9.06 | % |  | $ | 453,487 |  |  |  | 4.00 | % |  |  | n/ | a |  |  | n/ | a
Trustmark National Bank |  |  | 982,925 |  |  |  | 8.76 | % |  |  | 448,665 |  |  |  | 4.00 | % |  | $ | 560,831 |  |  |  | 5.00 | %
Components of accumulated other comprehensive (loss) income and the related tax effects | The following table presents the components of accumulated other comprehensive (loss) income and the related tax effects allocated to each component for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). Reclassification adjustments related to securities available for sale are included in securities gains, net in the accompanying consolidated statements of income. The amortization of prior service cost, recognized net loss due to BancTrust termination, recognized net loss due to lump sum settlements and recognized net actuarial (loss) gain on pension and other postretirement benefit plans are included in the computation of net periodic benefit cost (see Note 15 – Defined Benefit and Other Postretirement Benefits for additional details). Reclassification adjustments related to the cash flow hedge derivative are included in other interest expense in the accompanying consolidated statements of income.
|  | Before Tax |  |  | Tax (Expense) |  |  | Net of Tax |
|  | Amount |  |  | Benefit |  |  | Amount |
Year Ended December 31, 2014: |  |  |  |  |  |  |  |  |
Securities available for sale and transferred securities: |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the period |  | $ | 17,705 |  |  | $ | (6,772 | ) |  | $ | 10,933 |
Reclassification adjustment for net gains realized in net income |  |  | (300 | ) |  |  | 115 |  |  |  | (185 | )
Change in net unrealized holding loss on securities transferred to held to maturity |  |  | 6,010 |  |  |  | (2,299 | ) |  |  | 3,711 |
Total securities available for sale and transferred securities |  |  | 23,415 |  |  |  | (8,956 | ) |  |  | 14,459 |
Pension and other postretirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Net change in prior service costs |  |  | 249 |  |  |  | (95 | ) |  |  | 154 |
Recognized net loss due to BancTrust termination |  |  | 1,355 |  |  |  | (518 | ) |  |  | 837 |
Recognized net loss due to lump sum settlements |  |  | 905 |  |  |  | (346 | ) |  |  | 559 |
Recognized net actuarial loss |  |  | (21,657 | ) |  |  | 8,283 |  |  |  | (13,374 | )
Total pension and other postretirement benefit plans |  |  | (19,148 | ) |  |  | 7,324 |  |  |  | (11,824 | )
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |
Change in accumulated gain on effective cash flow hedge derivatives |  |  | (2,246 | ) |  |  | 859 |  |  |  | (1,387 | )
Reclassification adjustment for loss realized in net income |  |  | (2 | ) |  |  | 1 |  |  |  | (1 | )
Total cash flow hedge derivatives |  |  | (2,248 | ) |  |  | 860 |  |  |  | (1,388 | )
Total other comprehensive income |  | $ | 2,019 |  |  | $ | (772 | ) |  | $ | 1,247 |
Year Ended December 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale and transferred securities: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding losses arising during the period |  | $ | (67,135 | ) |  | $ | 25,679 |  |  | $ | (41,456 | )
Reclassification adjustment for net gains realized in net income |  |  | (485 | ) |  |  | 186 |  |  |  | (299 | )
Net unrealized holding loss on securities transferred to held to maturity |  |  | (46,383 | ) |  |  | 17,741 |  |  |  | (28,642 | )
Total securities available for sale and transferred securities |  |  | (114,003 | ) |  |  | 43,606 |  |  |  | (70,397 | )
Pension and other postretirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Net change in prior service costs |  |  | 251 |  |  |  | (96 | ) |  |  | 155 |
Recognized net loss due to lump sum settlement |  |  | 2,225 |  |  |  | (851 | ) |  |  | 1,374 |
Recognized net actuarial gain |  |  | 32,742 |  |  |  | (12,524 | ) |  |  | 20,218 |
Total pension and other postretirement benefit plans |  |  | 35,218 |  |  |  | (13,471 | ) |  |  | 21,747 |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |
Change in accumulated gain on effective cash flow hedge derivatives |  |  | 2,468 |  |  |  | (944 | ) |  |  | 1,524 |
Total other comprehensive loss |  | $ | (76,317 | ) |  | $ | 29,191 |  |  | $ | (47,126 | )
Year Ended December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the period |  | $ | 97 |  |  | $ | (37 | ) |  | $ | 60 |
Reclassification adjustment for net gains realized in net income |  |  | (1,059 | ) |  |  | 405 |  |  |  | (654 | )
Total securities available for sale |  |  | (962 | ) |  |  | 368 |  |  |  | (594 | )
Pension and other postretirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |
Net change in prior service costs |  |  | 52 |  |  |  | (20 | ) |  |  | 32 |
Recognized net actuarial gain |  |  | 1,354 |  |  |  | (518 | ) |  |  | 836 |
Total pension and other postretirement benefit plans |  |  | 1,406 |  |  |  | (538 | ) |  |  | 868 |
Total other comprehensive income |  | $ | 444 |  |  | $ | (170 | ) |  | $ | 274 |
Components of accumulated other comprehensive (loss) income | The following table presents the changes in the balances of each component of accumulated other comprehensive (loss) income for the years ended December 31, 2014, 2013 and 2012 ($ in thousands). All amounts are presented net of tax.
|  | Securities Available for Sale and Transferred Securities |  |  | Defined Benefit Pension Items |  |  | Cash Flow Hedge Derivatives |  |  | Total |
Balance at January 1, 2012 |  | $ | 45,529 |  |  | $ | (42,408 | ) |  | $ | - |  |  | $ | 3,121 |
Other comprehensive income before reclassification |  |  | 60 |  |  |  | 868 |  |  |  | - |  |  |  | 928 |
Amounts reclassified from accumulated other comprehensive income |  |  | (654 | ) |  |  | - |  |  |  | - |  |  |  | (654 | )
Net other comprehensive (loss) income |  |  | (594 | ) |  |  | 868 |  |  |  | - |  |  |  | 274 |
Balance at December 31, 2012 |  |  | 44,935 |  |  |  | (41,540 | ) |  |  | - |  |  |  | 3,395 |
Other comprehensive loss before reclassification |  |  | (70,098 | ) |  |  | 21,747 |  |  |  | 1,524 |  |  |  | (46,827 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | (299 | ) |  |  | - |  |  |  | - |  |  |  | (299 | )
Net other comprehensive (loss) income |  |  | (70,397 | ) |  |  | 21,747 |  |  |  | 1,524 |  |  |  | (47,126 | )
Balance at December 31, 2013 |  |  | (25,462 | ) |  |  | (19,793 | ) |  |  | 1,524 |  |  |  | (43,731 | )
Other comprehensive income before reclassification |  |  | 14,644 |  |  |  | (11,824 | ) |  |  | (1,387 | ) |  |  | 1,433 |
Amounts reclassified from accumulated other comprehensive loss |  |  | (185 | ) |  |  | - |  |  |  | (1 | ) |  |  | (186 | )
Net other comprehensive income (loss) |  |  | 14,459 |  |  |  | (11,824 | ) |  |  | (1,388 | ) |  |  | 1,247 |
Balance at December 31, 2014 |  | $ | (11,003 | ) |  | $ | (31,617 | ) |  | $ | 136 |  |  | $ | (42,484 | )

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