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Acquisitions - Narrative (Detail) (USD $)
9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Jan. 31, 2013
Jan. 31, 2013
Geoconstruction [Member]
May 30, 2012
Diberil Sociedad Anonima [Member]
Jul. 31, 2012
Diberil Sociedad Anonima [Member]
Oct. 31, 2013
Diberil Sociedad Anonima [Member]
Oct. 31, 2012
Diberil Sociedad Anonima [Member]
Jul. 15, 2010
Diberil Sociedad Anonima [Member]
May 30, 2012
Diberil Sociedad Anonima [Member]
Geoconstruction [Member]
Mar. 05, 2012
Layne Do Brazil [Member]
Oct. 04, 2012
Fursol [Member]
Oct. 04, 2012
Fursol [Member]
Computer Software [Member]
Oct. 31, 2013
Fursol [Member]
Computer Software [Member]
Business Acquisition [Line Items]                            
Percentage of stock acquired                       100.00%    
Aggregate purchase price of acquisition   $ 18,397,000                   $ 1,000,000    
Identifiable intangible asset associated with acquisition                         1,500,000  
Purchase price allocation to noncurrent liability         16,981,000             500,000    
Weighted-average life                           3 years
Remaining percentage of interest acquired         50.00%                  
Aggregate purchase price to acquire remaining equity interest         16,200,000                  
Amount of acquisition purchase price placed in escrow     2,861,000   2,400,000                  
Initial percentage of interest acquired                 50.00%          
Loss on remeasurement of equity investment   7,705,000       7,705,000                
Estimated fair value of noncontrolling interest before acquisition           15,800,000                
Discounts for lack of control 5.00%                          
Discounts for lack of marketability 10.00%                          
Acquisition related costs             200,000              
Goodwill 8,915,000   23,561,000 14,646,000 4,025,000         4,000,000        
Cash purchase price         16,200,000                  
Additional purchase price of acquisition               2,300,000            
Cash payment for acquired shares previously held by noncontrolling interests   2,743,000                 2,700,000      
Decrease in noncontrolling interest                     100,000      
Adjustment to equity related to the acquisition of noncontrolling interest                     $ 2,600,000