XML 53 R62.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Financial Instruments - Summary of Bond Activity (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract] |  |
Fair value, Beginning Balance | $ 29,776 | $ 30,923
Purchases | 5,650 | 5,742
Sales | (845) | (2,000)
Maturities and calls | (4,050) | (4,900)
Decrease in bond premium | (270) | (290)
Fair market value adjustment | (250) | 301
Fair value, Ending Balance | $ 30,011 | $ 29,776

X
- Definition Fair market value adjustment of bonds. + References No definition available. + Details
Name: | cbz_FairMarketValueAdjustmentOfBonds
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financial instrument maturities and calls of corporate and municipal debt. + References No definition available. + Details
Name: | cbz_FinancialInstrumentsOwnedCorporateDebtMaturitiesAndCalls
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financial instrument purchases of corporate and municipal debt. + References No definition available. + Details
Name: | cbz_FinancialInstrumentsOwnedCorporateDebtPurchases
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financial instrument sales of corporate and municipal debt. + References No definition available. + Details
Name: | cbz_FinancialInstrumentsOwnedCorporateDebtSales
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Decrease in bond premium. + References No definition available. + Details
Name: | cbz_IncreaseDecreaseInBondPremium
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value as of the balance sheet date of firm holdings in fixed income or other debt securities issued by a corporation or other issuer not elsewhere specified in the taxonomy. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29643736&loc=d3e42546-110969 + Details
Name: | us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant