Formation and Organization (Details)	6 Months Ended
	Jun. 30, 2018 vote $ / shares	Dec. 31, 2017 $ / shares
Class of Stock [Line Items]
Conversion of stock exchange ratio	1
Common Class A
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Common stock voting rights | vote	1
Common Class B
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Common stock voting rights | vote	1