Real estate activity (Details) (USD $)	Savoy of Garland apartments	ABC Land & Development USD ($)	DeSoto Ranch land USD ($)	LaDue, LLC USD ($)	Kelly	Andrew C land USD ($)	Pioneer Crossing land USD ($)
Real estate balance at Dec. 31, 2011	0
No of units,	144	8.01	7.39	8.01	52.59	5.22	21.26
sale price of land,		1.9	1.3	1.9	5.6	0.4	1.4
New mortgage in millions,	10.3	0.6			0.5
Existing mortgage in millions,	10.2		0.1		0.5	0.2	1
Gain on sale of land parcel,		$ 2.1	$ 0.1	$ 0.6		$ 0.5	$ 0.3
Accured interest rate,		5.00%	1.50%	5.00%	15.00%	15.00%
Closing stock Reserves,	0.9
Real estate balance. at Dec. 31, 2012	0