Business Segments - Capital Additions Related to Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Capital additions	$ 328,741	$ 363,003	$ 290,065
Same Store [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Capital additions	109,461	200,979	218,986
Other Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Capital additions	$ 219,280	$ 162,024	$ 71,079