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BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Sep. 30, 2012
Foreign Currency Transaction [Abstract]  
Schedule of foreign exchange rates
     Three Months Ended  Six Months Ended
   September 30, September 30,
     2012  2011  2012  2011
One British pound sterling into U.S. dollars            
 High  1.63  1.66  1.63  1.66
 Average  1.58  1.61  1.58  1.62
 Low  1.54  1.53  1.53  1.53
 At period-end  1.61  1.56  1.61  1.56
One euro into U.S. dollars            
 High  1.31  1.45  1.33  1.49
 Average  1.25  1.41  1.27  1.42
 Low  1.21  1.34  1.21  1.34
 At period-end  1.29  1.34  1.29  1.34
One Australian dollar into U.S. dollars            
 High  1.06  1.10  1.06  1.10
 Average  1.04  1.05  1.03  1.06
 Low  1.01  0.97  0.97  0.97
 At period-end  1.04  0.97  1.04  0.97
One Nigerian naira into U.S. dollars            
 High  0.0065  0.0068  0.0065  0.0068
 Average  0.0063  0.0066  0.0063  0.0065
 Low  0.0062  0.0063  0.0061  0.0063
 At period-end  0.0064  0.0064  0.0064  0.0064

     Three Months Ended  Six Months Ended
   September 30, September 30,
     2012  2011  2012  2011
One Brazilian real into U.S. dollars            
 High  0.5029  0.6511  0.5488  0.6511
 Average  0.4941  0.6170  0.5033  0.6222
 Low  0.4879  0.5322  0.4811  0.5322
 At period-end  0.4944  0.5476  0.4944  0.5476
Schedule of foreign exchange impact
     Three Months Ended Six Months Ended 
     September 30, 2012 September 30, 2012 
 Revenue $ (6,621) $ (15,399) 
 Operating expense   7,049   16,748 
 Earnings from unconsolidated affiliates, net of losses   7,268   3,111 
 Non-operating expense   (248)   (1,440) 
 Income before benefit for income taxes   7,448   3,020 
 Benefit for income taxes   (2,607)   (1,097) 
 Net income   4,841   1,923 
 Cumulative translation adjustment   4,321   4,626 
 Total stockholders' investment $ 9,162 $ 6,549