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Schedule of Authorized And Issued Common Stock And Preferred Stock (Detail) (USD $)
Mar. 31, 2015
Mar. 31, 2014
Stockholders' Equity [Abstract]    
Common stock shares authorized 125,000,000us-gaap_CommonStockSharesAuthorized 125,000,000us-gaap_CommonStockSharesAuthorized
Common stock par value $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common stock shares issued 47,029,359us-gaap_CommonStockSharesIssued 49,730,442us-gaap_CommonStockSharesIssued
Preferred stock shares authorized 3,000,000us-gaap_PreferredStockSharesAuthorized 3,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock par value      
Preferred stock shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued