Stock Repurchases 2017 (Detail) $ / shares in Units, shares in Thousands	6 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Stock Repurchases 2017 Detail
Stock repurchased and retired during period, shares | shares	1,064
Stock repurchased and retired during period, value	$ 14,081
Stock repurchased, weighted average price per share | $ / shares	$ 13.23
Stock repurchase program, authorized amount	$ 25,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 10,900,000