Summary of Significant Accounting Policies and Procedures and Newly Adopted Accounting Standards - Net Income Per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share Reconciliation [Abstract]
Weighted average shares used for the basic net income per share computation (in shares)	345,280,126	315,837,012	289,427,430
Incremental shares from share-based compensation (in shares)	135,132	322,265	179,532
Weighted average partnership common units convertible to common shares that were dilutive (in shares)	0	0	317,022
Weighted average shares used for diluted net income per share computation (in shares)	345,415,258	316,159,277	289,923,984
Unvested shares from share-based compensation that were anti-dilutive
Net income per common share
Anti-dilutive shares excluded from computation (in shares)	70,581	8,113	13,148
Weighted average partnership common units convertible to common shares that were anti-dilutive
Net income per common share
Anti-dilutive shares excluded from computation (in shares)	463,119	442,073	297,576