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Other Intangible Assets (Additional Disclosures) (Details) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
May 10, 2013
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Amortization of other intangible assets $ 4,800,000us-gaap_AmortizationOfIntangibleAssets $ 3,900,000us-gaap_AmortizationOfIntangibleAssets $ 2,100,000us-gaap_AmortizationOfIntangibleAssets  
Amortization of deferred financing costs 343,000us-gaap_AmortizationOfFinancingCosts 169,000us-gaap_AmortizationOfFinancingCosts 946,000us-gaap_AmortizationOfFinancingCosts  
Reduction in carrying value of deferred financing costs (less than $0.1 million)   100,000ftk_MaximumAmountofDeferredFinancingCostReductionRecognizedwithConvertibleSeniorNotesRepayment 1,800,000ftk_MaximumAmountofDeferredFinancingCostReductionRecognizedwithConvertibleSeniorNotesRepayment  
Impairment loss 0us-gaap_ImpairmentOfIntangibleAssetsFinitelived 0us-gaap_ImpairmentOfIntangibleAssetsFinitelived 0us-gaap_ImpairmentOfIntangibleAssetsFinitelived  
Minimum [Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Amortization period 2 years      
Maximum [Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Amortization period 20 years      
Patents and technology Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Acquired finite lived intangible assets       14,100,000us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentedTechnologyMember
Customer Lists [Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Acquired finite lived intangible assets       29,300,000us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerListsMember
Trademarks and brand names [Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Acquired finite lived intangible assets       1,000,000us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Trademarks and brand names [Member]        
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]        
Acquired indefinite lived intangible assets       $ 11,600,000us-gaap_IndefinitelivedIntangibleAssetsAcquired
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember