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Other Noninterest Income and Other Noninterest Expense (Components of Other Noninterest Income and Other Noninterest Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Other noninterest income: |  |  |
Income from bank-owned life insurance | $ 13,596 | $ 10,881 | $ 10,314
Credit related fees | 9,926 | 11,057 | 11,121
Income from derivatives | 5,196 | 2,745 | 1,645
Gain on sales of assets | 7,814 | 186 | 1,279
Safety deposit box income | 1,696 | 1,758 | 1,830
Other miscellaneous income | 9,254 | 9,334 | 9,249
Total other noninterest income | 47,482 | 35,961 | 35,438
Other noninterest expense: |  |  |
Advertising | 10,938 | 11,225 | 8,937
Ad valorem and franchise taxes | 8,741 | 10,498 | 10,492
Printing and supplies | 4,422 | 4,851 | 4,550
Insurance expense | 3,275 | 3,482 | 3,919
Travel | 4,268 | 5,331 | 4,066
Entertainment and contributions | 7,122 | 6,723 | 5,762
Tax credit investment amortization | 4,263 | 8,513 | 8,817
Other miscellaneous expense | 29,535 | 21,580 | 30,585
Total other noninterest expense | $ 72,564 | $ 72,203 | $ 77,128

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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