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Stock-based Compensation Employee Service Share-based Compensation, Allocation of Costs (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based Compensation $ 20,470us-gaap_ShareBasedCompensation $ 20,526us-gaap_ShareBasedCompensation $ 18,381us-gaap_ShareBasedCompensation
Cost of services and sales, exclusive of depreciation [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based Compensation 10,331us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_CostOfServicesAndSalesExclusiveOfDepreciationMember		 10,268us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_CostOfServicesAndSalesExclusiveOfDepreciationMember		 8,835us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_CostOfServicesAndSalesExclusiveOfDepreciationMember
General and Adminstrative Expense, exclusive of depreciation [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based Compensation $ 10,139us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_GeneralAndAdminstrativeExpenseExclusiveOfDepreciationMember		 $ 10,258us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_GeneralAndAdminstrativeExpenseExclusiveOfDepreciationMember		 $ 9,546us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= clb_GeneralAndAdminstrativeExpenseExclusiveOfDepreciationMember