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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, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Other noninterest income: |  |  |
Income from bank-owned life insurance | $ 11,473 | $ 13,596 | $ 10,881
Credit-related fees | 11,140 | 9,926 | 11,057
Income from derivatives | 5,870 | 5,196 | 2,745
Gain on sales of assets | 7,478 | 7,814 | 186
Other miscellaneous income | 13,814 | 10,950 | 11,092
Total other noninterest income | 49,775 | 47,482 | 35,961
Other noninterest expense: |  |  |
Advertising | 15,031 | 10,938 | 11,225
Ad valorem and franchise taxes | 12,797 | 8,741 | 10,498
Printing and supplies | 5,139 | 4,422 | 4,851
Travel | 5,043 | 4,268 | 5,331
Entertainment and contributions | 8,260 | 7,122 | 6,723
Tax credit investment amortization | 4,850 | 4,263 | 8,513
Loss share agreement termination | 6,603 |  |
Other miscellaneous expense | 24,913 | 32,810 | 25,062
Total other noninterest expense | $ 82,636 | $ 72,564 | $ 72,203

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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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