Long Term Water Assets - Additional Information (Details)				3 Months Ended	9 Months Ended	12 Months Ended
	Aug. 06, 2015 USD ($) acre_foot	Nov. 06, 2013 USD ($) acre_foot shares	Nov. 04, 2013	Mar. 31, 2016 acre_foot	Sep. 30, 2014 aft	Dec. 31, 2016 $ / acre_foot	Dec. 31, 2015 USD ($) a aft acre_foot $ / acre_foot	Dec. 31, 2014 USD ($) aft	Dec. 31, 2013 shares	Dec. 31, 2009 aft	Dec. 31, 2008 aft
Long Lived Assets Held-for-sale [Line Items]
Long-term water assets (Volume) | aft							49,018	49,461
Cost of purchased water							$ 5,483,000	$ 4,523,000
Contract renewal optional term							35 years
Water sold (volume) | aft					7,922
Water assets sales price							$ 10,165,000	$ 7,702,000
AVEK
Long Lived Assets Held-for-sale [Line Items]
AVEK water bank | aft							13,033	13,033		6,393	8,393
AVEK water for future delivery | aft							2,362	2,362
Long-term water assets (Volume) | acre_foot							14,786
SWP contracts
Long Lived Assets Held-for-sale [Line Items]
AVEK water for future delivery | aft										3,444
DMB Pacific LLC
Long Lived Assets Held-for-sale [Line Items]
Consumer price per acre | $ / acre_foot							675
Transferable water | AVEK
Long Lived Assets Held-for-sale [Line Items]
Long-term water assets (Volume) | a							22,179
Transferable water | DMB Pacific LLC
Long Lived Assets Held-for-sale [Line Items]
Long-term water assets (Volume) | acre_foot		6,693					6,693
Cost of purchased water		$ 18,700,000
Cost of purchased water, percentage paid in cash		50.00%
Cost of purchased water, percentage paid in shares of common stock		50.00%
Transferable water | PEF | Ranchcorp
Long Lived Assets Held-for-sale [Line Items]
Annual fee increase, percent	3.00%
Annual option payment, percent	30.00%
Water assets sales price	$ 1,025
SWP contracts
Long Lived Assets Held-for-sale [Line Items]
Water contract future amortization (Year 1)							$ 1,351,000
Water contract future amortization (Year 2)							1,351,000
Water contract future amortization (Year 3)							1,351,000
Water contract future amortization (Year 4)							1,351,000
Water contract future amortization (Year 5)							$ 1,351,000
Common Stock
Long Lived Assets Held-for-sale [Line Items]
Common stock issued for water purchase (in shares) | shares									251,876
Common Stock | DMB Pacific LLC
Long Lived Assets Held-for-sale [Line Items]
Weighted average price of common stock, measurement period (in days)			10 days
Common stock issued for water purchase (in shares) | shares		251,876
Maximum | DMB Pacific LLC
Long Lived Assets Held-for-sale [Line Items]
Annual fee increase, percent							3.00%
Maximum | Transferable water | PEF | Ranchcorp
Long Lived Assets Held-for-sale [Line Items]
Water assets, volume available for purchase in 2016 (up to) | acre_foot	2,000
Water assets, volume available for purchase from 2017-2030 (up to) | acre_foot	3,500
Scenario, Forecast
Long Lived Assets Held-for-sale [Line Items]
Water sold (volume) | acre_foot				500
Scenario, Forecast | DMB Pacific LLC
Long Lived Assets Held-for-sale [Line Items]
Consumer price per acre | $ / acre_foot						695