| **Accumulated Other Comprehensive Income (Loss) (Tables)**            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Equity [Abstract]**                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Schedule of accumulated other comprehensive income (loss)             | The following table summarizes the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, as of June 30, 2016 and 2015: Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans TotalBalance at December 31, 2015$12,325 $(2,347) $(11,340) $(1,362)Other comprehensive income before reclassifications10,885 (1,798)  9,087Amounts reclassified from accumulated other comprehensive income(1,107) 417  (690)Period change9,778 (1,381) — 8,397Balance at June 30, 2016$22,103 $(3,728) $(11,340) $7,035                Balance at December 31, 2014$14,098 $(2,182) $(13,546) $(1,630)Other comprehensive income before reclassifications(4,413) (304)  (4,717)Amounts reclassified from accumulated other comprehensive income(606) 463  (143)Period change(5,019) 159 — (4,860)Balance at June 30, 2015$9,079 $(2,023) $(13,546) $(6,490)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Reclassification out of accumulated other comprehensive income (loss) | The following table presents the reclassification adjustments out of accumulated other comprehensive income (loss) that were included in net income in the Consolidated Condensed Statements of Income for the three and six months ended June 30, 2016 and 2015:  Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended June 30,  Details about Accumulated Other Comprehensive Income (Loss)Components 2016 2015 Affected Line Item in the Statements of IncomeUnrealized gains (losses) on available for sale securities (1)      Realized securities gains (losses) reclassified into income $706 $(93) Other income - net realized gains on sales of available for sale securitiesRelated income tax expense (247) 33 Income tax expense  $459 $(60)         Unrealized gains (losses) on cash flow hedges (2)      Interest rate contracts $(318) $(358) Interest expense - subordinated debentures and term loansRelated income tax benefit 111 125 Income tax expense  $(207) $(233)         Total reclassifications for the period, net of tax $252 $(293)   Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Six Months Ended June 30,Details about Accumulated Other Comprehensive Income (Loss)Components 20162015Affected Line Item in the Statements of IncomeUnrealized gains (losses) on available for sale securities (1) Realized securities gains reclassified into income $1,703$932Other income - net realized gains on sales of available for sale securitiesRelated income tax expense (596)(326)Income tax expense $1,107$606 Unrealized gains (losses) on cash flow hedges (2) Interest rate contracts $(642)$(712)Interest expense - subordinated debentures and term loansRelated income tax benefit 225249Income tax expense $(417)$(463) Total reclassifications for the period, net of tax $690$143(1)  For additional detail related to unrealized gains (losses) on available for sale securities and related amounts reclassified from accumulated        other comprehensive income see NOTE 3. INVESTMENT SECURITIES.(2)  For additional detail related to unrealized gains (losses) on cash flow hedges and related amounts reclassified from accumulated other comprehensive income see NOTE 8. DERIVATIVE FINANCIAL INSTRUMENTS. |

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| - References
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| - Definition
Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).
+ References
No definition available.
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| - Definition
Tabular disclosure of the components of accumulated other comprehensive income (loss).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580
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