Land, Buildings and Improvements and Assets Held for Sale - Operating Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Lease, Lease Income [Abstract]
Lease income — fixed	$ 281,269	$ 261,704	$ 557,410	$ 519,031
Lease income – variable	33,085	27,360	64,669	54,698
Total operating lease income	$ 314,354	$ 289,064	$ 622,079	$ 573,729