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Stock Repurchases 2017 (Detail)
 3 Months Ended 9 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Stock Repurchases 2017 Detail    
Stock repurchased and retired during period, shares | shares 299 1,363,000
Stock repurchased and retired during period, value $ 3,826,000 $ 17,907,000 [1]
Stock repurchased, weighted average price per share | $ / shares $ 12.81 $ 13.14
Stock repurchase program, authorized amount $ 25,000,000 $ 25,000,000
Stock repurchase program, remaining authorized repurchase amount $ 7,100,000 $ 7,100,000
[1] Amount excludes commission fees