Real Estate and Tangible Water Assets (Details) (USD $)	3 Months Ended		12 Months Ended		3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Real Estate and Tangible Water Assets [Line Items]
Impairment of real estate	$ (1,875,000)	[1],[2]	$ (2,865,000)	[3]
Real Estate, Fair Value	1,300,000
Asset impairment charge			3,500,000
Capitalized costs			0
Real Estate Investment Property, at Cost	15,169,000		16,463,000
Accumulated amortization	11,118,000		10,899,000
Residential real estate and home construction inventories	329,710,000		322,938,000
Other real estate inventories completed or under development	10,308,000		10,308,000
Water and Water Rights	42,531,000		42,530,000
Real estate and tangible water assets, net	397,718,000		392,239,000
Real Estate Operations
Real Estate and Tangible Water Assets [Line Items]
Impairment of real estate			(2,900,000)
Real Estate Investment Property, at Cost			1,400,000
Leasehold Improvements
Real Estate and Tangible Water Assets [Line Items]
Amortization	$ 220,000				$ 220,000

[1] The Company had a non-recurring fair value measurement for real estate and capitalized development costs that resulted in an impairment loss discussed in Note 2 “Real Estate and Tangible Water Assets.”

[2] The Company had a non-recurring fair value measurement for a tangible water asset that resulted in an impairment loss discussed in Note 2 “Real Estate and Tangible Water Assets.”

[3] The Company had a non-recurring fair value measurement of a real estate asset discussed in Note 2 “Real Estate and Tangible Water Assets, Net.”