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Fair Value Disclosures (Details 3) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | --- | ---
Assets: |  |  |  |
Cash and cash equivalents | $ 15,527,721us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 24,851,737us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 59,395,238us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 38,882,691us-gaap_CashAndCashEquivalentsAtCarryingValue
Securities | 87,218,000us-gaap_MarketableSecurities | 92,243,000us-gaap_MarketableSecurities |  |
Federal Home Loan Bank stock | 2,322,900us-gaap_FederalHomeLoanBankStock | 2,322,900us-gaap_FederalHomeLoanBankStock |  |
Loans, net | 291,869,338us-gaap_LoansAndLeasesReceivableNetReportedAmount | 286,236,578us-gaap_LoansAndLeasesReceivableNetReportedAmount |  |
Accrued interest receivable | 1,142,899us-gaap_InterestReceivable | 977,925us-gaap_InterestReceivable |  |
Cash and cash equivalents, Estimated Fair Value | 15,528,000us-gaap_CashAndCashEquivalentsFairValueDisclosure | 24,852,000us-gaap_CashAndCashEquivalentsFairValueDisclosure |  |
Securities, Estimated Fair Value | 87,219,000csbq_MarketableSecuritiesFairValueDisclosure | 92,244,000csbq_MarketableSecuritiesFairValueDisclosure |  |
Federal Home Loan Bank stock, Estimated Fair Value | 2,323,000us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure | 2,323,000us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |  |
Loans, net, Estimated Fair Value | 292,490,000us-gaap_LoansReceivableFairValueDisclosure | 287,411,000us-gaap_LoansReceivableFairValueDisclosure |  |
Accrued interest receivable, Estimated Fair Value | 1,143,000csbq_AccruedInterestReceivableFairValueDisclosure | 978,000csbq_AccruedInterestReceivableFairValueDisclosure |  |
Liabilities: |  |  |  |
Noninterest-bearing demand deposits | 57,034,792us-gaap_NoninterestBearingDepositLiabilities | 75,206,540us-gaap_NoninterestBearingDepositLiabilities |  |
Interest-bearing demand deposits | 26,464,173us-gaap_InterestBearingDepositLiabilities | 24,563,987us-gaap_InterestBearingDepositLiabilities |  |
Savings deposits and money market accounts | 80,861,110csbq_SavingDepositsAndMoneyMarketAccounts | 86,329,930csbq_SavingDepositsAndMoneyMarketAccounts |  |
Time deposits | 144,294,390us-gaap_TimeDeposits | 155,313,920us-gaap_TimeDeposits |  |
Federal funds purchased and securities sold under agreements to repurchase | 29,409,505us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase | 22,974,117us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase |  |
Federal Home Loan Bank advances and other borrowings | 36,000,000csbq_FederalHomeLoanBankAdvancesAndOtherBorrowings | 26,740,000csbq_FederalHomeLoanBankAdvancesAndOtherBorrowings |  |
Accrued interest payable | 71,925us-gaap_InterestPayableCurrentAndNoncurrent | 82,320us-gaap_InterestPayableCurrentAndNoncurrent |  |
Noninterest-bearing demand deposits, Estimated Fair Value | 57,035,000csbq_NoninterestBearingDemandDeposits | 75,207,000csbq_NoninterestBearingDemandDeposits |  |
Interest-bearing demand deposits, Estimated Fair Value | 26,464,000csbq_InterestBearingDemandDeposits | 24,564,000csbq_InterestBearingDemandDeposits |  |
Savings deposits and money market accounts, Estimated Fair Value | 80,861,000csbq_SavingsDepositsAndMoneyMarketAccountsFairValue | 86,330,000csbq_SavingsDepositsAndMoneyMarketAccountsFairValue |  |
Time deposits, Estimated Fair Value | 145,907,000csbq_TimeDepositsFairValue | 156,698,000csbq_TimeDepositsFairValue |  |
Federal funds purchased and securities sold under agreements to repurchase, Estimated Fair Value | 29,410,000us-gaap_FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure | 22,974,000us-gaap_FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure |  |
Federal Home Loan Bank advances and other borrowings, Estimated Fair Value | 36,321,000csbq_FederalHomeLoanBankAdvancesAndOtherBorrowingsFairValue | 27,449,000csbq_FederalHomeLoanBankAdvancesAndOtherBorrowingsFairValue |  |
Accrued interest payable, Estimated Fair Value | 72,000csbq_AccruedInterestPayableFairValueDisclosure | 82,000csbq_AccruedInterestPayableFairValueDisclosure |  |
Unrecognized financial instruments (net of contract amount): |  |  |  |
Commitments to extend credit | 0csbq_CommitmentsToExtendCredit | 0csbq_CommitmentsToExtendCredit |  |
Letters of credit | 0csbq_LettersOfCredit | 0csbq_LettersOfCredit |  |
Lines of credit | 0us-gaap_LineOfCredit | 0us-gaap_LineOfCredit |  |
Commitments to extend credit, Estimated Fair Value | 0csbq_CommitmentsToExtendCreditFairValueDisclosure | 0csbq_CommitmentsToExtendCreditFairValueDisclosure |  |
Letters of credit, Estimated Fair Value | 0csbq_LettersOfCreditFairValueDisclosure | 0csbq_LettersOfCreditFairValueDisclosure |  |
Lines of credit, Estimated Fair Value | $ 0us-gaap_LinesOfCreditFairValueDisclosure | $ 0us-gaap_LinesOfCreditFairValueDisclosure |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount after offset of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 1 -Article 9 + Details
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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6478792&loc=d3e63345-112809 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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