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Stockholders' Equity - Additional Information (Detail) - USD ($) |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 23, 2017 | Mar. 31, 2017 | Mar. 31, 2016 | Jun. 30, 2016
Equity [Line Items] |  |  |  |
Treasury shares acquired |  | 100,079 |  |
Shares repurchased during period |  | $ 2,500,000 |  |
Dividends per share declared on outstanding common stock | $ 0.14 | $ 0.14 | $ 0.14 |
Installment1-FY2016 |  |  |  |
Equity [Line Items] |  |  |  |
Dividends payable date |  | Mar. 02, 2017 |  |
Dividends payable, shareholders record date |  | Feb. 17, 2017 |  |
Maximum [Member] |  |  |  |
Equity [Line Items] |  |  |  |
Amount of shares authorized to repurchase |  |  |  | $ 20,000,000

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