Commitments and Contingencies (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2015 participant	Mar. 31, 2019 USD ($)	Sep. 30, 2014	Sep. 30, 2020 USD ($) a facility	Dec. 31, 2019 USD ($)	Jun. 03, 2010 a
Loss Contingencies [Line Items]
Amount expected to be paid				$ 10,943,000
Payments for water contracts				$ 10,144,000
Contract renewal optional term				35 years
Contractual obligation for future water payments				$ 261,952,000
Estimated future payments				$ 800,000
Incentive fee on contract termination, measurement period from entitlement achievement date			5 years
Number of community facility districts | facility				2
Letter of credit period				2 years
Letter of credit renewal period				2 years
Annual cost related to the letter of credit				$ 206,000	$ 239,000
Special taxes paid		$ 2,521,000
Antelope Valley Groundwater Cases | Settled Litigation
Loss Contingencies [Line Items]
Number of parties in agreement for settlement | participant	140
Percentage of current water usage with the adjudication boundary (more than)	99.00%
West CFD
Loss Contingencies [Line Items]
Acres of land related to land liens | a				420
Bond debt sold by TRPFFA				$ 28,620,000
Additional bond debt authorized to be sold in future				0
Additional reimbursement funds				$ 0
East CFD
Loss Contingencies [Line Items]
Acres of land related to land liens | a				1,931
Bond debt sold by TRPFFA				$ 55,000,000
Additional bond debt authorized to be sold in future				65,000,000
Standby letter of credit
Loss Contingencies [Line Items]
Letters of credit outstanding amount				4,393,000
Annual cost related to the letter of credit				$ 68,000
DMB
Loss Contingencies [Line Items]
Contract renewal optional term				35 years
KCWA
Loss Contingencies [Line Items]
Acres of land transferred | a						20,000