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