Income (Loss) Per Share - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 vote
Class A Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock, voting rights	one vote per share
Votes per share	1
Class B Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock, voting rights	ten votes per share
Votes per share	10