CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	LCIF [Member]
Beginning balance (in units) at Dec. 31, 2016		83,241,396
Beginning balance at Dec. 31, 2016		$ 387,623
Increase (Decrease) in Partners' Capital [Roll Forward]
Changes in co-borrower debt allocation		$ 180,565
Redemption of OP units (in units)		(2,675,785)
Redemption of OP units		$ (129,990)
Distributions		(48,573)
Net income	$ 55,181	$ (4,900)
Ending balance (in units) at Sep. 30, 2017		80,565,611
Ending balance at Sep. 30, 2017		$ 384,725
Beginning balance (in units) at Dec. 31, 2017		80,565,611
Beginning balance at Dec. 31, 2017		$ 366,282
Increase (Decrease) in Partners' Capital [Roll Forward]
Changes in co-borrower debt allocation		(23,399)
Distributions		(44,858)
Net income	$ 205,232	$ 63,037
Ending balance (in units) at Sep. 30, 2018	3,206,000	80,565,611
Ending balance at Sep. 30, 2018		$ 361,062