Dispositions and Assets Held for Sale (Tables)

12 Months Ended

Dec. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Summary of real property disposition activity

The following is a summary of our real property disposition activity for the periods presented (in thousands):

	Year Ended
	December 31, 2018		December 31, 2017		December 31, 2016
Real property dispositions:
Seniors Housing Operating	$	36,627	$	74,832	$	—
Triple-net	835,093		916,689		1,773,614
Outpatient Medical	253,397		19,697		78,786
Total dispositions	1,125,117		1,011,218		1,852,400
Gain (loss) on sales of real property, net	415,575		344,250		364,046
Net other assets (liabilities) disposed	1,178		22,546		133,622
Proceeds from real property sales	$	1,541,870	$	1,378,014	$	2,350,068

The following represents the activity related to these properties for the periods presented (in thousands):

	Year Ended December 31,
	2018		2017		2016
Revenues:
Total revenues	$	148,725	$	275,087	$	565,450
Expenses:
Interest expense	294		6,655		52,675
Property operating expenses	81,698		81,182		89,666
Provision for depreciation	16,900		55,294		122,153
Total expenses	98,892		143,131		264,494
Income (loss) from real estate dispositions, net	$	49,833	$	131,956	$	300,956