Mortagage on real estate (Details) (USD $)	Maumelle USD ($)	Huntington Ridge	Laguna Vista	Savoy of Garland	Metro Center	Pecan Pointe	Blue Lake	Lake Forest	Mission Oaks	Paramount Terrace	Sugar Mill
Balance of mortagage at Dec. 31, 2011	$ 0
Existising mortagage apt(unit)	240	198	206	144	144	232	70	222	228	181	160
Balance of mortagage. at Dec. 31, 2012	$ 0
Accrued interest (Percentage) at Dec. 31, 2012	3.00%	3.03%	3.03%	3.03%	2.95%	3.03%	2.85%	2.85%	2.95%	2.85%	2.85%
New existing mortagage (Millions) at Dec. 31, 2012	16.8	15	17.7	10.3	11	16.8	4.1	12.8	15.6	3.2	12.0
paid off amt on existing mortagage (Millions) at Dec. 31, 2012	16.1	14.6	17	10.2	10.5	16.4	3.9	12	14.9	2.8	11.8
closing costs (Millions) at Dec. 31, 2012	1.0	1.2	1.1	0.9	0.7	1.3	0.2	1.0	1.0	0.4	1.0