Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Supplemental Cash Flow Information [Abstract]
Interest paid			$ 124,647	$ 133,000
Income taxes paid, net of refunds			1,916	1,421
Net cash paid			122,297	120,458
Prepaid expenses and other assets, net			30,823	14,303
Gain on sale of assets, net	$ (2,846)	$ (23,322)	(2,144)	(66,753)
Loss on facility lease termination and modification, net	$ 1,797	$ 146,467	2,006	146,467
Net cash paid			0	10,548
Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Trade accounts payable			10,392	(15,192)
Net cash paid			122,297	120,458
Acquisition of assets, net of related payables and cash received
Supplemental Cash Flow Information [Abstract]
Property, plant and equipment and leasehold intangibles, net			0	237,563
Other intangible assets, net			0	(4,796)
Financing lease obligations			0	36,120
Other liabilities			0	2,433
Net cash paid			0	271,320
Proceeds from sale of assets, net
Supplemental Cash Flow Information [Abstract]
Financing lease obligations			0	93,514
Prepaid expenses and other assets, net			(5,798)	(1,991)
Assets held for sale			(41,882)	(18,758)
Property, plant and equipment and leasehold intangibles, net			(688)	(87,864)
Investments in unconsolidated ventures			(156)	(58,179)
Refundable fees and deferred revenue			0	8,345
Other liabilities			1,762	(789)
Gain on sale of assets, net			(2,144)	(66,753)
Net cash received			(52,430)	(130,897)
Lease termination And modification, net
Supplemental Cash Flow Information [Abstract]
Prepaid expenses and other assets, net			0	(2,000)
Property, plant and equipment and leasehold intangibles, net			0	(52,920)
Financing lease obligations			0	(21,898)
Deferred liabilities			0	67,950
Loss on facility lease termination and modification, net			0	22,260
Net cash paid			0	57,188
Assets designated as held for sale
Supplemental Cash Flow Information [Abstract]
Prepaid expenses and other assets, net			5	0
Assets held for sale			4,928	(58,445)
Property, plant and equipment and leasehold intangibles, net			4,933	(58,445)
Net			0	0
Noncash lease termination and modification, net
Supplemental Cash Flow Information [Abstract]
Prepaid expenses and other assets, net			648	2,813
Property, plant and equipment and leasehold intangibles, net			1,666	(2,959)
Financing lease obligations			0	(2,375)
Other liabilities			(337)	326
Operating lease right-of-use assets			(8,644)	0
Operating lease obligations			9,289	0
Deferred liabilities			0	(122,304)
Loss on facility lease termination and modification, net			2,006	124,207
Net			0	0
Non-development | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid			121,066	89,417
Development | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid			10,623	13,390
Non-development - reimbursable | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid			1,000	1,764
Development - reimbursable | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid			$ 0	$ 695