Employee Benefits - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||
Profit sharing contribution | 2.75%csbb_PercentageProfitSharingContributionOfEligibleParticipantsCompensation | 2.75%csbb_PercentageProfitSharingContributionOfEligibleParticipantsCompensation | 2.50%csbb_PercentageProfitSharingContributionOfEligibleParticipantsCompensation |
Company match of participant contributions | 50.00%csbb_PercentageMaximumEmployersContributionOnParticipantsContributionUnderProfitSharingPlan | ||
Maximum annual compensation contribution | 2.00%csbb_PercentageOfMatchingContributionUnderCompensationPlan | ||
Expense under plan | $ 269csbb_FourZeroOneKProfitSharingPlanExpense | $ 284csbb_FourZeroOneKProfitSharingPlanExpense | $ 270csbb_FourZeroOneKProfitSharingPlanExpense |
Stock options granted | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |
Total intrinsic value of stock options and outstanding | 48us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | 34us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | |
Total intrinsic value of exercisable stock options | $ 48us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | $ 34us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | |
Stock options vested | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber |
X | ||||||||||
- Definition
Four zero one K profit sharing plan expense. No definition available.
|
X | ||||||||||
- Definition
Percentage maximum employers contribution on participants contribution under profit sharing plan. No definition available.
|
X | ||||||||||
- Definition
Percentage of matching contribution under compensation plan. No definition available.
|
X | ||||||||||
- Definition
Percentage profit sharing contribution of eligible participants compensation. No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Gross number of share options (or share units) granted during the period. No definition available.
|
X | ||||||||||
- Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|