Earnings Per Common Share - Antidilutive (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding (in shares)	4,831	3,758	4,831	3,758
Convertible (in shares)	9,023	8,832	9,222	8,832
Operating Partnership Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding (in shares)	1,909	1,909	1,909	1,909
Convertible (in shares)	1,909	1,909	1,909	1,909
Series D Preferred Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding (in shares)	1,849	1,849	1,849	1,849
Convertible (in shares)	7,014	6,923	7,014	6,923
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding (in shares)	1,073	0	1,073	0
Convertible (in shares)	100	0	299	0