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Note 9 - Financial Information by Segment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Revenues-    
Revenue $ 208,464us-gaap_SalesRevenueNet $ 242,824us-gaap_SalesRevenueNet
Operating Income (loss)-    
Operating Income 6,128us-gaap_OperatingIncomeLoss 20,757us-gaap_OperatingIncomeLoss
Corporate Segment [Member]    
Operating Income (loss)-    
Operating Income (7,817)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember		 (8,356)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
Fluids Systems [Member]    
Revenues-    
Revenue 171,902us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= nr_FluidsSystemsMember		 211,400us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= nr_FluidsSystemsMember
Operating Income (loss)-    
Operating Income (1,702)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= nr_FluidsSystemsMember		 15,740us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= nr_FluidsSystemsMember
Mats and Integrated Services [Member]    
Revenues-    
Revenue 36,562us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= nr_MatsAndIntegratedServicesMember		 31,424us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= nr_MatsAndIntegratedServicesMember
Operating Income (loss)-    
Operating Income $ 15,647us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= nr_MatsAndIntegratedServicesMember		 $ 13,373us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= nr_MatsAndIntegratedServicesMember