Shareholders' Equity - Additional Information (Detail) (USD $)	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares, shares authorized	75,000,000	75,000,000
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares outstanding	27,129,832	27,129,832
Treasury stock, shares	25,835,965	25,835,965
Number of share authorized under share repurchase program			2,000,000
Number of share available for repurchase under share repurchase program	732,377
Preferred shares, shares issued	3,677	3,677
Preferred shares, shares outstanding	3,677	3,677
Preferred shares, par value	$ 0.01
Preferred shares, liquidation preference	$ 3,677,000	$ 3,677,000