Significant property acquisitions and sales in second quarter of 2014 (Details) (USD $)	Apr. 03, 2014
Significant property acquisitions and sales in second quarter of 2014
Company sold a commercial building to an independent third party in square foot	512,593
Sale price of commercial building to an independent third party	$ 16,600,000
Gain recorded on the sale of commercial building to an independent third party	$ 7,000,000