Consolidated Statements of Equity [Parenthetical] - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted stock issuances (in shares)	48,482	59,038	41,322
Common Stock
Common stock issuance from conversion of exchangeable notes (in shares)		123,808,000	57,729,000
Conversion from Class B to common stock (in shares)	2,271