Segments - Segment Results (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended					8 Months Ended	9 Months Ended
	Aug. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Aug. 31, 2019	Sep. 30, 2018
Segment Results:
Rental income	$ 31,247			$ 60,287			$ 132,812	$ 179,539
Interest income on loans receivable	540			1,131			2,669	1,964
Other income	794			993			2,916	1,934
Property expenses (including reimbursable)	(1,426)			(1,909)			(4,887)	(5,573)
Depreciation and amortization	(10,682)			(20,969)			(47,378)	(63,071)
Impairments, net of recoveries for loan losses	(295)			(9,343)			(4,869)	(15,415)
Interest expense	(18,344)			(27,672)			(78,254)	(83,427)
Loss on debt extinguishment	(144)						(21,411)	(363)
Gain (loss) on disposition of assets	221			4,210			1,740	7,464
Net loss and total comprehensive loss	(2,011)	$ (16,566)	$ (38,270)	(3,574)	$ 979	$ (7,579)	(56,847)	(10,174)
Operating Segments
Segment Results:
Rental income	31,247			60,287			132,812	179,539
Interest income on loans receivable	540			1,131			2,669	1,964
Other income	794			993			2,916	1,934
Property Management and Servicing Fees	(1,294)			(1,750)			(5,070)	(5,164)
Property expenses (including reimbursable)	(1,426)			(1,909)			(4,887)	(5,573)
Depreciation and amortization	(10,682)			(20,969)			(47,378)	(63,071)
Impairments, net of recoveries for loan losses	(295)			(9,343)			(4,869)	(15,415)
Interest expense	(18,344)			(27,672)			(78,254)	(83,427)
Loss on debt extinguishment	(144)						(21,411)	(363)
Gain (loss) on disposition of assets	221			4,210			1,740	7,464
Segment (loss) income	617			4,978			(21,732)	17,888
Operating Segments | Master Trust 2014
Segment Results:
Rental income	28,783			45,317			118,204	134,323
Interest income on loans receivable	43			72			179	224
Other income	265			785			949	1,623
Property Management and Servicing Fees	(1,294)			(1,750)			(5,070)	(5,164)
Property expenses (including reimbursable)	(1,111)			(765)			(3,541)	(2,998)
Depreciation and amortization	(10,476)			(15,782)			(42,386)	(46,805)
Impairments, net of recoveries for loan losses				(4,113)			(5,959)	(9,118)
Interest expense	(17,598)			(26,551)			(70,628)	(80,348)
Loss on debt extinguishment	(144)						(144)	(363)
Gain (loss) on disposition of assets	256			1,386			1,626	(757)
Segment (loss) income	(1,276)			(1,401)			(6,770)	(9,383)
Operating Segments | Other Properties
Segment Results:
Rental income	2,464			14,970			14,608	45,216
Interest income on loans receivable	497			1,059			2,490	1,740
Other income	529			208			1,967	311
Property expenses (including reimbursable)	(315)			(1,144)			(1,346)	(2,575)
Depreciation and amortization	(206)			(5,187)			(4,992)	(16,266)
Impairments, net of recoveries for loan losses	(295)			(5,230)			1,090	(6,297)
Interest expense	(746)			(1,121)			(7,626)	(3,079)
Loss on debt extinguishment							(21,267)
Gain (loss) on disposition of assets	(35)			2,824			114	8,221
Segment (loss) income	1,893			6,379			(14,962)	27,271
Corporate
Segment Results:
Non-allocated expenses	$ (2,628)			$ (8,552)			$ (35,115)	$ (28,062)