Shareholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2003
Stockholders Equity Note [Abstract]
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 common stock repurchased	0	0
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