Leases - Additional Information (Details) $ in Thousands			3 Months Ended		6 Months Ended
	Apr. 28, 2016 facility extension_period	Nov. 01, 2013 facility extension_period	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Schedule of Leased Assets [Line Items]
Variable expenses			$ 260		$ 1,778
Lease payments			214,900	$ 115,900	422,800	$ 231,800
Lease income			80,200		151,700
General and administrative expense
Schedule of Leased Assets [Line Items]
Variable expenses			260		575
Interest expense
Schedule of Leased Assets [Line Items]
Variable expenses			0		0
Penn Master Lease
Schedule of Leased Assets [Line Items]
Number of facilities with leased real estate | facility		19
Lease term		15 years
Number of options to extend lease | extension_period		4
Lease renewal term		5 years
Lease - expected term with renewal options		35 years
Adjusted annual escalator percentage		2.00%
Adjusted revenue to rent ratio		1.8
Period over which fixed component is adjusted		5 years
Adjustment to fixed component as percentage of the average change to net revenues during the preceding five years		4.00%
Adjustment to fixed component as percentage of the average change to net revenues during preceding month		20.00%
Variable expenses			11,963	12,543	25,011	24,984
Penn Master Lease | General and administrative expense
Schedule of Leased Assets [Line Items]
Variable expenses			6,238	0	13,042	0
Penn Master Lease | Interest expense
Schedule of Leased Assets [Line Items]
Variable expenses			$ 5,725	$ 12,543	$ 11,969	$ 24,984
Pinnacle Master Lease
Schedule of Leased Assets [Line Items]
Number of facilities with leased real estate | facility	12
Number of options to extend lease | extension_period	5
Lease renewal term	5 years
Lease - expected term with renewal options	32 years 6 months
Remaining lease term	7 years 6 months
Initial lease term	10 years
Annual escalator percentage - up to	2.00%
Adjusted Revenue to Rent Ratio, as defined	1.8
Percentage rent escalation interval	2 years
Percentage of average net revenues during preceding two years	4.00%
Percentage rent baseline period	2 years