Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 4)

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Income Taxes (Details 4) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
U.S. foreign tax credits
 
Tax credit carryforwards  
Tax credit carryforwards available $ 8,012
U.S. research credits
 
Tax credit carryforwards  
Tax credit carryforwards available 172
Texas franchise tax credits
 
Tax credit carryforwards  
Tax credit carryforwards available $ 3,480