Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Supplemental Disclosure of Cash Flow Information:
Interest paid	$ 84,155	$ 87,303
Income taxes paid	1,846	1,656
Cash paid for operating leases	9,277	0
Supplemental Disclosure of Noncash Investing and Financing Activities:
Accrued capital expenditures	3,922	243
Dividend distributions declared, but not paid	66,397	65,544
Issuance of OP Units in HTALP	2,603	0	$ 0
Issuance of OP Units in HTALP in connection with an acquisition	2,000	0
Redemption of noncontrolling interest	7,263	5,195
Redemption of redeemable noncontrolling interest	3,441	0
ROU assets obtained in exchange for lease obligations	$ 200,879	$ 0