Common Stock and Other Equity Related Transactions - Common Stock, OP Units, and Distributions (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock Outstanding [Roll Forward]
Shares outstanding at January 1, (in shares)	182,230,631	182,089,595	179,842,036
Common stock issued through the ATM Equity Offering Program and its predecessor (in shares)	1,660,290	0	1,010,472
Common stock issued through conversion of OP Units (in shares)	1,601,266	12,028	997,750
Common stock issued through exercise of options (in shares)	0	0	5,600
Common stock issued through restricted stock grants (in shares)	162,955	151,104	193,262
Common stock forfeitures (in shares)	0	0	0
Common stock issued through ESPP and Dividend Reinvestment Plan (in shares)	32,778	32,099	41,589
Common stock repurchased and retired (in shares)	(47,541)	(54,195)	(1,114)
Shares outstanding at December 31, (in shares)	185,640,379	182,230,631	182,089,595