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Description of Business (Detail Textuals) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 16, 2014 | Jun. 30, 2014
Description Of Business [Line Items] |  |
Proceeds from offering |  | $ 114,429
Class A common stock | IPO |  |
Description Of Business [Line Items] |  |
Initial public offering completed for number of common stock | 14,657,200 |
Number of shares issued and sold | 8,333,333 |
Price per share | $ 15.00 |
Proceeds from offering | $ 114,429 |
Underwriting discount | 8,438 |
Offering expense payable | $ 2,133 |
Class A common stock | Mayflower Limited Partnership ("Mayflower") | IPO |  |
Description Of Business [Line Items] |  |
Number of shares issued and sold | 6,323,867 |

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