Summary of Significant Accounting Policies and Procedures and Recent Accounting Pronouncements - Net Income Per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income per common share
Weighted average shares used for the basic net income per share computation	289,427,430	273,465,680	255,066,500
Incremental shares from share-based compensation	179,532	154,050	240,728
Weighted average partnership common units convertible to common shares that were dilutive	317,022	317,022	317,022
Weighted average shares used for diluted net income per share computation	289,923,984	273,936,752	255,624,250
Unvested Shares
Net income per common share
Anti-dilutive shares	13,148	32,205	475
Convertible Partnership Units
Net income per common share
Anti-dilutive shares	297,576	88,182	198,429