Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 62,107	$ 62,721
Income taxes paid, net of refunds	606	(128)
Net cash paid	60,055	66,592
Prepaid expenses and other assets, net	12,358	(6,174)
Loss (gain) on sale of assets, net	702	(43,431)
Treasury stock	6,000
Loss on facility lease termination and modification, net	209	0
Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Trade accounts payable	(184)	(17,096)
Net cash paid	60,055	66,592
Acquisition of assets, net of related payables and cash received
Supplemental Cash Flow Information [Abstract]
Property, plant and equipment and leasehold intangibles, net	0	32,126
Other intangible assets, net	0	(4,796)
Net cash paid	0	27,330
Proceeds from sale of assets, net
Supplemental Cash Flow Information [Abstract]
Prepaid expenses and other assets, net	(231)	(579)
Assets held for sale	(29,550)	(18,758)
Property, plant and equipment and leasehold intangibles, net	(457)	(978)
Investments in unconsolidated ventures	0	(20,084)
Refundable fees and deferred revenue	0	8,345
Other liabilities	(78)	(425)
Loss (gain) on sale of assets, net	702	(43,431)
Net cash received	(29,458)	(75,060)
Purchase of treasury stock
Supplemental Cash Flow Information [Abstract]
Treasury stock	288	0
Accounts payable	(288)	0
Net	0	0
Assets designated as held for sale
Supplemental Cash Flow Information [Abstract]
Assets held for sale	5,249	3,336
Property, plant and equipment and leasehold intangibles, net	5,249	3,336
Net	0	0
Lease termination and modification, net
Supplemental Cash Flow Information [Abstract]
Prepaid expenses and other assets, net	160	0
Property, plant and equipment and leasehold intangibles, net	(175)	0
Other liabilities	(224)	0
Loss on facility lease termination and modification, net	209	0
Net	0	0
Non-development | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid	54,602	41,736
Development | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid	5,269	5,381
Non-development - reimbursable | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid	0	1,764
Development - reimbursable | Additions to property, plant and equipment and leasehold improvements
Supplemental Cash Flow Information [Abstract]
Net cash paid	$ 0	$ 615