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Other (Income) Expense, Net (Foreign Currency (Gain ) Loss by Currency) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Foreign exchange $ 840us-gaap_ForeignCurrencyTransactionGainLossBeforeTax $ 1,600us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
AustralianDollar [Member]    
Foreign exchange 119us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_AustraliandollarMember		 (6)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_AustraliandollarMember
British Pound [Member]    
Foreign exchange 374us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_BritishPoundMember		 (52)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_BritishPoundMember
Canadian Dollar [Member]    
Foreign exchange 1,274us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_CanadianDollarMember		 1,028us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_CanadianDollarMember
Euro [Member]    
Foreign exchange (1,055)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_EuroMember		 52us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_EuroMember
Russian Ruble [Member]    
Foreign exchange (52)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_RussianRubleMember		 176us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_RussianRubleMember
Other Currencies Net [Member]    
Foreign exchange $ 180us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_OtherCurrenciesNetMember		 $ 402us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
/ clb_ForeignCurrencyTypeAxis
= clb_OtherCurrenciesNetMember