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Subsequent Event (Details) - Common Stock [Member] - USD ($) | Aug. 06, 2018 | Jun. 30, 2018
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Share Repurchase Program [Abstract] |  |
Stock repurchase program, approved amount |  | $ 20,000,000
Subsequent Event [Member] |  |
Share Repurchase Program [Abstract] |  |
Stock repurchase program, approved amount | $ 37,000,000 |

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- References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Details
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- Details
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