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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Apr. 30, 2016 10,000,000   (243,411)      
Balance at Apr. 30, 2016 $ 1,000 $ 991 $ (3,040) $ 35,524 $ 125 $ 34,600
Net income       10,367   10,367
Change in unrealized gains on securities, net of taxes         333 $ 333
Purchase of treasury stock (in shares)   (44,924)     (44,924)
Purchase of treasury stock     $ (741)     $ (741) [1]
Dividends declared     (6,705)   (6,705)
Balance (in shares) at Apr. 30, 2017 10,000,000   (288,335)      
Balance at Apr. 30, 2017 $ 1,000 991 $ (3,781) 39,186 458 37,854
Net income       14,738   14,738
Change in unrealized gains on securities, net of taxes         325 $ 325
Purchase of treasury stock (in shares)   (20,045)     (20,045) [1]
Purchase of treasury stock     $ (354)     $ (354) [1]
Dividends declared     (9,022)   (9,022)
Balance (in shares) at Apr. 30, 2018 10,000,000   (308,380)      
Balance at Apr. 30, 2018 $ 1,000 991 $ (4,135) 44,902 783 43,541
Net income       11,150   11,150
Change in unrealized gains on securities, net of taxes         895 $ 895
Purchase of treasury stock (in shares)   (28,059)     (28,059) [1],[2]
Purchase of treasury stock     $ (608)     $ (608) [1],[2]
Dividends declared     (7,454)   (7,454)
Balance (in shares) at Apr. 30, 2019 10,000,000   (336,439)      
Balance at Apr. 30, 2019 $ 1,000 $ 991 $ (4,743) $ 48,598 $ 1,678 $ 47,524
[1] Were acquired during the $3 million repurchase program authorized in September 2012.
[2] Were acquired during the $2 million repurchase program authorized in October 2018.