Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

Summary information by reportable business segment is as follows:

	For the Year Ended December 31, 2018
	Triple-Net Leased Properties			Senior Living Operations			Office Operations		All Other			Total
	(In thousands)
Revenues:
Rental income	$	737,796		$	—		$	776,011	$	—		$	1,513,807
Resident fees and services	—			2,069,477			—		—			2,069,477
Office building and other services revenue	2,522			—			7,592		3,302			13,416
Income from loans and investments	—			—			—		124,218			124,218
Interest and other income	—			—			—		24,892			24,892
Total revenues	$	740,318		$	2,069,477		$	783,603	$	152,412		$	3,745,810
Total revenues	$	740,318		$	2,069,477		$	783,603	$	152,412		$	3,745,810
Less:
Interest and other income	—			—			—		24,892			24,892
Property-level operating expenses	—			1,446,201			243,679		—			1,689,880
Office building services costs	—			—			1,418		—			1,418
Segment NOI	740,318			623,276			538,506		127,520			2,029,620
(Loss) income from unconsolidated entities	(47,901		)	(4,465		)	477		(3,145		)	(55,034		)
Segment profit	$	692,417		$	618,811		$	538,983	$	124,375		1,974,586
Interest and other income												24,892
Interest expense												(442,497		)
Depreciation and amortization												(919,639		)
General, administrative and professional fees												(151,982		)
Loss on extinguishment of debt, net												(58,254		)
Merger-related expenses and deal costs												(30,547		)
Other												(66,768		)
Gain on real estate dispositions												46,247
Income tax benefit												39,953
Income from continuing operations												$	415,991

	For the Year Ended December 31, 2017
	Triple-Net Leased Properties		Senior Living Operations			Office Operations		All Other			Total
	(In thousands)
Revenues:
Rental income	$	840,131	$	—		$	753,467	$	—		$	1,593,598
Resident fees and services	—		1,843,232			—		—			1,843,232
Office building and other services revenue	4,580		—			7,497		1,600			13,677
Income from loans and investments	—		—			—		117,608			117,608
Interest and other income	—		—			—		6,034			6,034
Total revenues	$	844,711	$	1,843,232		$	760,964	$	125,242		$	3,574,149
Total revenues	$	844,711	$	1,843,232		$	760,964	$	125,242		$	3,574,149
Less:
Interest and other income	—		—			—		6,034			6,034
Property-level operating expenses	—		1,250,065			233,007		—			1,483,072
Office building services costs	—		—			3,391		—			3,391
Segment NOI	844,711		593,167			524,566		119,208			2,081,652
Income (loss) from unconsolidated entities	845		(61		)	503		(1,848		)	(561		)
Segment profit	$	845,556	$	593,106		$	525,069	$	117,360		2,081,091
Interest and other income											6,034
Interest expense											(448,196		)
Depreciation and amortization											(887,948		)
General, administrative and professional fees											(135,490		)
Loss on extinguishment of debt, net											(754		)
Merger-related expenses and deal costs											(10,535		)
Other											(20,052		)
Gain on real estate dispositions											717,273
Income tax benefit											59,799
Income from continuing operations											$	1,361,222

	For the Year Ended December 31, 2016
	Triple-Net Leased Properties		Senior Living Operations		Office Operations		All Other		Total
	(In thousands)
Revenues:
Rental income	$	845,834	$	—	$	630,342	$	—	$	1,476,176
Resident fees and services	—		1,847,306		—		—		1,847,306
Office building and other services revenue	4,921		—		13,029		3,120		21,070
Income from loans and investments	—		—		—		98,094		98,094
Interest and other income	—		—		—		876		876
Total revenues	$	850,755	$	1,847,306	$	643,371	$	102,090	$	3,443,522
Total revenues	$	850,755	$	1,847,306	$	643,371	$	102,090	$	3,443,522
Less:
Interest and other income	—		—		—		876		876
Property-level operating expenses	—		1,242,978		191,784		—		1,434,762
Office building services costs	—		—		7,311		—		7,311
Segment NOI	850,755		604,328		444,276		101,214		2,000,573
Income from unconsolidated entities	2,363		1,265		590		140		4,358
Segment profit	$	853,118	$	605,593	$	444,866	$	101,354	2,004,931
Interest and other income									876
Interest expense									(419,740		)
Depreciation and amortization									(898,924		)
General, administrative and professional fees									(126,875		)
Loss on extinguishment of debt, net									(2,779		)
Merger-related expenses and deal costs									(24,635		)
Other									(9,988		)
Gain on real estate dispositions									98,203
Income tax benefit									31,343
Income from continuing operations									$	652,412

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

Assets by reportable business segment are as follows:

	As of December 31,
	2018				2017
	(Dollars in thousands)
Assets:
Triple-net leased properties	$	6,795,142	30.1	%	$	7,778,064	32.4	%
Senior living operations	8,156,187		36.1		7,654,609		32.0
Office operations	6,772,957		30.0		6,897,696		28.8
All other assets	860,269		3.8		1,624,172		6.8
Total assets	$	22,584,555	100.0	%	$	23,954,541	100.0	%

Segment Reporting Information Expenditures for Additions to Long-Lived Assets [Table Text Block]

Capital expenditures, including investments in real estate property and development project expenditures, by reportable business segment are as follows:

	For the Years Ended December 31,
	2018		2017		2016
	(In thousands)
Capital expenditures:
Triple-net leased properties	$	58,744	$	254,542	$	74,192
Senior living operations	337,750		261,900		105,614
Office operations	332,147		579,885		1,487,787
Total capital expenditures	$	728,641	$	1,096,327	$	1,667,593

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

Geographic information regarding our operations is as follows:

	For the Years Ended December 31,
	2018		2017		2016
	(In thousands)
Revenues:
United States	$	3,524,875	$	3,361,682	$	3,242,353
Canada	192,350		186,049		174,831
United Kingdom	28,585		26,418		26,338
Total revenues	$	3,745,810	$	3,574,149	$	3,443,522

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

	As of December 31,
	2018		2017
	(In thousands)
Net real estate property:
United States	$	18,861,163	$	19,253,724
Canada	963,588		1,070,903
United Kingdom	268,906		297,827
Total net real estate property	$	20,093,657	$	20,622,454