Summary of Significant Accounting Policies - Business Description (Details)	Oct. 15, 2015 shares	Oct. 13, 2015 votes
Class A Common Stock
Class of Stock [Line Items]
Common stock, issued shares (in shares) | shares	176,076,869
Reverse stock split conversion ratio	1
Class B Common Stock
Class of Stock [Line Items]
Common stock votes per share entitled | votes		10
Reverse stock split conversion ratio		0.3164