Equity-Based Compensation - Performance Awards (Details) - Performance Shares - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Shares
Beginning of Period (in shares)	2,139	2,157
Granted (in shares)	811	510
Forfeited (in shares)	(23)	(96)
Paid Out (in shares)	(410)	(432)
End of Period (in shares)	2,517	2,139
Weighted-Average Grant Date Fair Value
Beginning of Period (in USD per share)	$ 71.82	$ 69.36
Granted (in USD per share)	62.58	66.04
Forfeited (in USD per share)	94.91	74.82
Paid Out (in USD per share)	73.10	51.01
End of Period (in USD per share)	$ 68.42	$ 71.82