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Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | $ 15,823,043 | $ 15,795,918 |
Deferred Revenue | 30,074 | 27,671 |
Loans, net of unearned income | 15,792,969 | 15,768,247 | $ 15,346,617
Real-estate - commercial mortgage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 6,304,475 | 6,364,804 |
Loans, net of unearned income | 6,304,475 | 6,364,804 | 6,262,008
Commercial - industrial, financial and agricultural |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 4,264,602 | 4,300,297 |
Loans, net of unearned income | 4,264,602 | 4,300,297 | 4,245,849
Real-estate - home equity |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 1,491,395 | 1,559,719 |
Loans, net of unearned income | 1,491,395 | 1,559,719 | 1,579,739
Real estate - residential mortgage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 2,094,530 | 1,954,711 |
Loans, net of unearned income | 2,094,530 | 1,954,711 | 1,784,712
Real-estate - construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 990,705 | 1,006,935 |
Loans, net of unearned income | 990,705 | 1,006,935 | 938,900
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 360,315 | 313,783 |
Loans, net of unearned income | 360,315 | 313,783 | $ 283,156
Leasing and other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | 315,243 | 291,556 |
Overdrafts |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans, gross of unearned income | $ 1,778 | $ 4,113 |

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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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