XML 24 R46.htm IDEA: XBRL DOCUMENT v3.3.0.814
Summary of Change in Stockholder's Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Stockholders Equity Note [Line Items]        
Balance at Beginning of Period     $ 1,010,593  
Net Earnings $ 29,819 $ 50,319 67,581 $ 88,029
Balance at End of Period 1,069,691   1,069,691  
Common Stock [Member]        
Stockholders Equity Note [Line Items]        
Balance at Beginning of Period     502  
Stock Option Exercises     1  
Balance at End of Period 503   503  
Capital in Excess of Par Value [Member]        
Stockholders Equity Note [Line Items]        
Balance at Beginning of Period     272,441  
Stock Compensation Expense     8,329  
Shares Redeemed to Settle Employee Taxes     (1,728)  
Stock Option Exercises     5,074  
Share Repurchases and Retirement     (10,744)  
Balance at End of Period 273,372   273,372  
Retained Earnings [Member]        
Stockholders Equity Note [Line Items]        
Balance at Beginning of Period     749,717  
Dividends Declared to Stockholders     (10,054)  
Net Earnings     67,581  
Balance at End of Period 807,244   807,244  
Accumulated Other Comprehensive Losses [Member]        
Stockholders Equity Note [Line Items]        
Balance at Beginning of Period     (12,067)  
Change in Funded Status of Pension Plan, net of tax     639  
Balance at End of Period $ (11,428)   $ (11,428)