| **Accumulated Other Comprehensive Income (Loss) (Tables)**            | 3 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 March 31, 2015 and 2014: Accumulated Other Comprehensive Income (Loss) Unrealized Gains (Losses) on Securities Available for Sale Unrealized Gains (Losses) on Securities Available for Sale for which a Portion of Other-Than-Temporary Impairment has been Recognized in Income Unrealized Gains (Losses) on Cash Flow Hedges Unrealized Gains (Losses) on Defined Benefit Plans TotalBalance at December 31, 2014$14,098  $(2,182) $(13,546) $(1,630)Other comprehensive income before reclassifications980  (829)  151Amounts reclassified from accumulated other comprehensive income(666)  230  (436)Period change314 — (599) — (285)Balance at March 31, 2015$14,412 $— $(2,781) $(13,546) $(1,915)                    Balance at December 31, 2013$1,566 $(1,847) $(501) $(5,628) $(6,410)Other comprehensive income before reclassifications5,207 1,164 (823)  5,548Amounts reclassified from accumulated other comprehensive income(378)  224  (154)Period change4,829 1,164 (599) — 5,394Balance at March 31, 2014$6,395 $(683) $(1,100) $(5,628) $(1,016)                                                                                                                                                                                                                                                                                             |
| 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 months ended March 31, 2015 and 2014:  Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Three Months Ended March 31,  Details about Accumulated Other Comprehensive Income (Loss)Components 2015 2014 Affected Line Item in the Statements of IncomeUnrealized gains (losses) on available for sale securities (1)      Realized securities gains reclassified into income $1,025 $581 Other income - net realized gains on sales of available for sale securitiesRelated income tax expense (359) (203) Income tax expense  $666 $378         Unrealized gains (losses) on cash flow hedges (2)      Interest rate contracts $(354) $(344) Interest expense - subordinated debentures and term loansRelated income tax benefit 124 120 Income tax expense  $(230) $(224)         Total reclassifications for the period, net of tax $436 $154         (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 6. DERIVATIVE FINANCIAL INSTRUMENTS. |

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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=36458714&loc=SL7669686-108580
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