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Stock-Based Compensation Stock-Based Compensation - Performance Vesting Stock Options (Details) - $ / shares
12 Months Ended
Mar. 04, 2010
Mar. 31, 2006
Mar. 31, 2017
Chief executive officer | Stock Options with Performance Conditions [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, Exercises in Period 83,333 166,667  
Options, Exercises in Period, Weighted Average Exercise Price   $ 24.15  
Fair Value Assumptions Expected Term after Vesting   10 years  
Concurrent Grant or Replacement Award in Period 0    
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     171,000
Long Term Incentive Plan 2016 2017 [Member] | Share-based Compensation Award, Tranche Three [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     171,000
Long Term Incentive Plan 2014 2015 [Member] | Share-based Compensation Award, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     73,000
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     103,000
Long Term Incentive Plan 2015 2016 [Member] | Share-based Compensation Award, Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options     102,000