XML 13 R9.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Investment Securities | 3 Months Ended
--- | ---
Mar. 31, 2012
Investment Securities [Abstract] |
Investment Securities | (3) Investment Securities Investment securities as of March 31, 2012 are summarized as follows:
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Securities Available for Sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agencies |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed |  | $ | 319,355 |  |  | $ | 3,554 |  |  | $ | (185 | ) |  | $ | 322,724 |
State, County & Municipal |  |  | 8,502 |  |  |  | 168 |  |  |  | (28 | ) |  |  | 8,642 |
Corporate Obligations |  |  | 2,000 |  |  |  | 115 |  |  |  | (5 | ) |  |  | 2,110 |
Asset-Backed Securities |  |  | 367 |  |  |  | -- |  |  |  | (235 | ) |  |  | 132 |
|  | $ | 330,224 |  |  | $ | 3,837 |  |  | $ | (453 | ) |  | $ | 333,608 |
Securities Held to Maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State, County and Municipal |  | $ | 47 |  |  | $ | 1 |  |  | $ | -- |  |  | $ | 48 |
The amortized cost and fair value of investment securities as of March 31, 2012, by contractual maturity, are shown hereafter. Expected maturities will differ from contractual maturities because issuers have the right to call or prepay obligations with or without call or prepayment penalties.
|  | Securities |
|  | Available for Sale |  |  | Held to Maturity |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
Due Less Than One Year |  | $ | 125 |  |  | $ | 129 |  |  | $ | -- |  |  | $ | -- |
Due After One Year Through Five Years |  |  | 2,355 |  |  |  | 2,487 |  |  |  | 47 |  |  |  | 48 |
Due After Five Years Through Ten Years |  |  | 5,707 |  |  |  | 5,816 |  |  |  | -- |  |  |  | -- |
Due After Ten Years |  |  | 2,682 |  |  |  | 2,452 |  |  |  | -- |  |  |  | -- |
|  |  | 10,869 |  |  |  | 10,884 |  |  |  | 47 |  |  |  | 48 |
Mortgage-Backed Securities |  |  | 319,355 |  |  |  | 322,724 |  |  |  | -- |  |  |  | -- |
|  | $ | 330,224 |  |  | $ | 333,608 |  |  | $ | 47 |  |  | $ | 48 |
Investment securities as of December 31, 2011 are summarized as follows:
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Securities Available for Sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agencies |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed |  | $ | 291,097 |  |  | $ | 3,152 |  |  | $ | (188 | ) |  | $ | 294,061 |
State, County & Municipal |  |  | 7,475 |  |  |  | 132 |  |  |  | (23 | ) |  |  | 7,584 |
Corporate Obligations |  |  | 2,000 |  |  |  | 124 |  |  |  | (10 | ) |  |  | 2,114 |
Asset-Backed Securities |  |  | 426 |  |  |  | -- |  |  |  | (294 | ) |  |  | 132 |
|  | $ | 300,998 |  |  | $ | 3,408 |  |  | $ | (515 | ) |  | $ | 303,891 |
Securities Held to Maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State, County and Municipal |  | $ | 46 |  |  | $ | -- |  |  | $ | -- |  |  | $ | 46 |
Proceeds from the sale of investments available for sale during first three months of 2012 totaled $6,082 compared to $73,896 for the first three months of 2011. The sale of investments available for sale during 2012 resulted in gross realized gains of $197. This was offset by other than temporary impairment charges of $(60). The sale of investments available for sale during 2011 resulted in gross realized gain of $397 and losses of $(1). Nonaccrual securities are securities for which principal and interest are doubtful of collection in accordance with original terms and for which accruals of interest have been discontinued due to payment delinquency. Fair value of securities on nonaccrual status totaled $132 and $132 as of March 31, 2012 and December 31, 2011, respectively. Investment securities having a carry value approximating $129,023 and $136,838 as of March 31, 2012 and December 31, 2011, respectively, were pledged to secure public deposits and for other purposes. Information pertaining to securities with gross unrealized losses at March 31, 2012 and December 31, 2011 aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  |  |  |  | Gross |  |  |  |  |  | Gross |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
March 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed |  | $ | 29,749 |  |  | $ | (179 | ) |  | $ | 899 |  |  | $ | (6 | ) |  | $ | 30,648 |  |  | $ | (185 | )
State, County and Municipal |  |  | 2,200 |  |  |  | (27 | ) |  |  | 73 |  |  |  | (1 | ) |  |  | 2,273 |  |  |  | (28 | )
Corporate Obligations |  |  | -- |  |  |  | -- |  |  |  | 995 |  |  |  | (5 | ) |  |  | 995 |  |  |  | (5 | )
Asset-Backed Securities |  |  | -- |  |  |  | -- |  |  |  | 132 |  |  |  | (235 | ) |  |  | 132 |  |  |  | (235 | )
|  | $ | 31,949 |  |  | $ | (206 | ) |  | $ | 2,099 |  |  | $ | (247 | ) |  | $ | 34,048 |  |  | $ | (453 | )
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-Backed |  | $ | 26,440 |  |  | $ | (188 | ) |  | $ | -- |  |  | $ | -- |  |  | $ | 26,440 |  |  | $ | (188 | )
State, County and Municipal |  |  | 1,224 |  |  |  | (22 | ) |  |  | 73 |  |  |  | (2 | ) |  |  | 1,297 |  |  |  | (24 | )
Corporate Obligations |  |  | -- |  |  |  | -- |  |  |  | 990 |  |  |  | (10 | ) |  |  | 990 |  |  |  | (10 | )
Asset-Backed Securities |  |  | -- |  |  |  | -- |  |  |  | 132 |  |  |  | (293 | ) |  |  | 132 |  |  |  | (293 | )
|  | $ | 27,664 |  |  | $ | (210 | ) |  | $ | 1,195 |  |  | $ | (305 | ) |  | $ | 28,859 |  |  | $ | (515 | )
Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. At March 31, 2012, the debt securities with unrealized losses have depreciated 1.31 percent from the Company's amortized cost basis. These securities are guaranteed by either the U.S. Government, other governments or U.S. corporations, except for asset-backed securities. In analyzing an issuer's financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred and the results of reviews of the issuer's financial condition. The unrealized losses are largely due to increases in market interest rates over the yields available at the time the underlying securities were purchased. As management has the ability to hold debt securities until maturity, or for the foreseeable future if classified as available-for-sale, no declines are deemed to be other than temporary. However, the Company did own one asset-backed security at March 31, 2012 which has been in a continuous unrealized loss position for more than twelve months. This investment is comprised of one issuance of a trust preferred security, has a book value of $367 and an unrealized loss of $235. Management evaluates this investment on a quarterly basis utilizing a third-party valuation model. The results of this model revealed other-than-temporary impairment and as a result, $60 was written off during the three month period ended March 31, 2012. The Company does not intend to sell this investment, nor does the Company consider it likely that it will be required to sell the investment prior to recovery of the remaining fair value.

X
- Details
Name: | cban_InvestmentSecuritiesAbstract
Namespace Prefix: | cban_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563 Reference 2: 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=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 -Topic 320 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 -Topic 320 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
Name: | us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration