Earnings per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share Basic [Line Items]
Weighted average common shares/units outstanding for basic EPS/EPU	169,643,000	167,536,000	168,781,000	167,488,000
Weighted average common shares/units outstanding for diluted EPS/EPU	169,971,000	167,962,000	168,781,000	167,877,000
Income (loss) per common share - basic	$ 0.11	$ 0.31	$ (0.04)	$ 0.85
Income (loss) per common share - diluted	$ 0.11	$ 0.31	$ (0.04)	$ 0.85
Weighted Average Limited Partnership Units Outstanding, Basic	765,046	349,902	765,046	349,902
Partnership Interest [Member]
Earnings Per Share Basic [Line Items]
Weighted average common shares/units outstanding for basic EPS/EPU	170,409,000	167,886,000	169,546,000	167,838,000
Weighted average common shares/units outstanding for diluted EPS/EPU	170,736,000	168,312,000	169,546,000	168,227,000
Income (loss) per common unit - basic	$ 0.11	$ 0.31	$ (0.04)	$ 0.85
Income (loss) per common unit - diluted	$ 0.11	$ 0.31	$ (0.04)	$ 0.85
Continuing Operations [Member]
Earnings Per Share Basic [Line Items]
Income (loss) attributable to common stockholders - basic	$ 19,046	$ 51,728	$ (6,286)	$ 142,174
Income (loss) attributable to common stockholders - diluted	19,046	51,728	(6,286)	142,174
Continuing Operations [Member] | Partnership Interest [Member]
Earnings Per Share Basic [Line Items]
Income (loss) attributable to common stockholders - basic	19,133	51,837	(6,314)	142,473
Income (loss) attributable to common stockholders - diluted	$ 19,133	$ 51,837	$ (6,314)	$ 142,473