Common Stock (Details)	1 Months Ended	9 Months Ended
	Dec. 31, 2016 item	Sep. 30, 2017 item Vote
Class of Stock [Line Items]
Number of common stock of reorganization company converted into number of share of common stock of reorganized company	1
Number of preferred stock of reorganization company converted into number of share of preferred stock of reorganized company	1
Number of classes of voting common stock		2
Number of classes of non-voting common stock		1
Number of shares of Class A common stock will be automatically converted by each outstanding share of Class B common stock		1
Class A
Class of Stock [Line Items]
Number of vote per share for outstanding shares of common stock | Vote		1
Class B
Class of Stock [Line Items]
Number of vote per share for outstanding shares of common stock | Vote		10