CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Rental and other property revenues (including $173 and $175 for the three months and $343 and $350 for the six months ended 2015 and 2014, respectively, from related parties)	$ 23,756	$ 18,511	$ 46,060	$ 36,814
Property operating expenses (including $178 and $148 for the three months and $331 and $293 for the six months ended 2015 and 2014, respectively, from related parties)	10,929	9,359	21,793	18,562
General and administrative (including $727 and $656 for the three months and $1,547 and $1,400 for the six months ended 2015 and 2014, respectively, from related parties)	1,278	2,738	3,045	4,287
Interest income (including $2,748 and $4,004 for the three months and $6,167 and $6,117 for the six months ended 2015 and 2014, respectively, from related parties)	2,994	4,005	6,755	6,118
Mortgage and loan interest (including $0 and $0 for the three months and $31 and $31 for the six months ended 2015 and 2014, respectively, from related parties)	(8,216)	(7,869)	(18,401)	(16,868)
Related Party [Member]
Rental and other property revenues (including $173 and $175 for the three months and $343 and $350 for the six months ended 2015 and 2014, respectively, from related parties)	173	175	343	350
Property operating expenses (including $178 and $148 for the three months and $331 and $293 for the six months ended 2015 and 2014, respectively, from related parties)	178	148	331	293
General and administrative (including $727 and $656 for the three months and $1,547 and $1,400 for the six months ended 2015 and 2014, respectively, from related parties)	727	656	1,547	1,400
Interest income (including $2,748 and $4,004 for the three months and $6,167 and $6,117 for the six months ended 2015 and 2014, respectively, from related parties)	2,748	4,004	6,167	6,117
Mortgage and loan interest (including $0 and $0 for the three months and $31 and $31 for the six months ended 2015 and 2014, respectively, from related parties)	$ 0	$ 0	$ 31	$ 31