Other assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Acquired in-place leases	$ 281,650	$ 132,906
Acquired below-market leases in which we are the lessee	0	17,434
Deferred compensation plan	22,225	19,238
Deferred financing costs – $2.2 billion unsecured senior line of credit	13,064	16,060
Deposits	31,028	12,974
Furniture, fixtures, and equipment	23,031	14,787
Interest rate hedge assets	0	2,606
Net investment in direct financing leases	39,916	39,149
Notes receivable	435	528
Operating lease right-of-use asset	264,709	0
Other Assets	32,040	19,861
Prepaid expenses	11,324	13,690
Property, plant, and equipment	174,292	81,024
Total	$ 893,714	$ 370,257