Estimated Development Liability for Sold Land (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 homesite	Dec. 31, 2013	Dec. 31, 2012
Estimated Development Liability for Sold Land [Abstract]
Number of estimated homes the estimated liability covers (homesites)	8,000
Gross estimated unexpended costs	$ 35,888,000	$ 36,117,000
Less costs relating to unsold home sites	(2,885,000)	(2,885,000)
Estimated development liability for sold land	33,003,000	33,232,000
Charges related to estimated liability for sold land	0	300,000	100,000
Cash expenditures for improvements	$ 200,000	$ 100,000	$ 100,000