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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Taxes computed at statutory rate, amount | $ 107,952 | $ 65,423 | $ 59,418
State income taxes, net of federal income tax benefit, amount | 4,737 | 1,917 | 2,595
Tax-exempt interest, amount | (18,870) | (14,497) | (7,849)
Life insurance contracts | (5,360) | (4,833) | (3,798)
Tax credits, amount | (9,374) | (10,518) | (12,495)
Employee share-based compensation | (5,824) |  |
Impact of deferred tax asset re-measurement | 19,520 |  |
Other, net, amount | 21 | 135 | 433
Total included in net income | $ 92,802 | $ 37,627 | $ 38,304
Taxes computed at statutory rate | 35.00% | 35.00% | 35.00%
State income taxes, net of federal income tax benefit | 1.50% | 1.00% | 1.50%
Tax-exempt interest | (6.10%) | (7.80%) | (4.60%)
Life insurance contracts | (1.70%) | (2.60%) | (2.20%)
Tax credits | (3.00%) | (5.60%) | (7.40%)
Employee share-based compensation | (1.90%) |  |
Impact of deferred tax asset re-measurement | 6.30% |  |
Other, net |  | 0.10% | 0.30%
Income tax expense | 30.10% | 20.10% | 22.60%
Hancock Holding Company [Member] |  |  |
Total included in net income | $ (6,324) | $ (6,617) | $ (6,334)

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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