| **Accounting for Certain Loans Acquired in a Purchase** | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| **Receivables [Abstract]**                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Accounting for Certain Loans Acquired in a Purchase     | ACCOUNTING FOR CERTAIN LOANS ACQUIRED IN A PURCHASEThe following table includes the outstanding balance and carrying amount of loans acquired during the years ended December 31, 2012 and 2013, which are included in the balance sheet amounts of loans receivable at March 31, 2014 and December 31, 2013. March 31, 2014December 31, 2013CFSSCBTotalCFSSCBTotalCommercial and industrial loans$77,480$7,839$85,319$81,303$8,184$89,487Agricultural production financing and other loans to farmers9419411,1611,161Real estate loans:  Construction15,61015,61017,96217,962Commercial and farmland301,26820,147321,415311,63123,418335,049Residential162,2658,686170,951166,7549,359176,113       Home Equity46,42817,69464,12249,04218,23667,278Individuals' loans for household and other personal expenditures1,9642052,1692,3602692,629Other Loans9090132407539Total$605,105$55,512$660,617$629,184$61,034$690,218Carrying Amount$570,092$46,647$616,739$585,913$50,269$636,182Allowance42617443229229Carrying Amount Net of Allowance$569,666$46,630$616,296$585,913$50,040$635,953The balance of the allowance for loan losses and the corresponding provision expense for loans acquired and accounted for under ASC310-30 was $443,000 and $229,000 at March 31, 2014 and December 31, 2013, respectively. Accretable yield, or income expected to be collected, is as follows:Three Months Ended March 31, 2014Three Months Ended March 31, 2013CFSSCBTotalSCBBeginning balance$13,435$5,864$19,299Additions$5,142Accretion(1,155)(614)(1,769)(771)Reclassification from nonaccretable238253491Disposals(107)(88)(195)Ending balance$12,411$5,415$17,826$4,371 |

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| - Definition
The entire disclosure for certain contractual rights to receive money on demand or on fixed or determinable dates with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15029-111544
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| - Details**Name:**us-gaap_ReceivablesAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |