XML 18 R46.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Jan. 01, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Corporate bonds $ 38,385us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue $ 38,399us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue $ 30,011us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue
Level 1 [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Deferred compensation plan assets 64,267us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
60,290us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Corporate bonds 38,385us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
38,399us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Level 2 [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Interest rate swap (55)us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
(126)us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
 
Level 3 [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Contingent purchase price liabilities $ (32,318)cbz_ContingentPurchasePriceLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
$ (33,368)cbz_ContingentPurchasePriceLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member