XML 33 R43.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Financial Instruments - Summary of Bond Activity (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Fair value at beginning of period | $ 30,011 | $ 29,776
Purchases | 12,955 | 5,650
Sales | (245) | (845)
Maturities and calls | (5,426) | (4,050)
Increase (decrease) in bond premium | 1,198 | (270)
Fair market value adjustment | (133) | (250)
Fair value at end of period | $ 38,360 | $ 30,011

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=35711157&loc=d3e42546-110969 + Details
Name: | us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant