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Commitments and Contingencies (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 10, 2009
defendant
Feb. 28, 2015
participant
Mar. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
a
aft
facility
Dec. 31, 2014
USD ($)
aft
Commitment and Contingencies Disclosure [Line Items]          
Future minimum payments due       $ 7,900,000  
Long-term water assets (volume) | aft       49,018 49,461
Estimated future payments       $ 800,000  
Number of community facility districts | facility       2  
Letter of credit period       2 years  
Letter of credit renewal period       2 years  
Special taxes paid         $ 933,000
Standby letter of credit          
Commitment and Contingencies Disclosure [Line Items]          
Letters of credit outstanding amount       $ 5,426,000  
Annual cost related to letter of credit       $ 83,000  
West CFD          
Commitment and Contingencies Disclosure [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          
Commitment and Contingencies Disclosure [Line Items]          
Acres of land related to land liens | a       1,931  
Letters of credit outstanding amount       $ 39,750,000  
Additional bond debt authorized to be sold in future       $ 80,250,000  
Proceeds from additional reimbursement funds     $ 4,971,000    
Transferable water          
Commitment and Contingencies Disclosure [Line Items]          
Long-term water assets (volume) | aft       22,179  
Transferable water | DMB          
Commitment and Contingencies Disclosure [Line Items]          
Long-term water assets (volume) | aft       6,693  
Affiliated Entity          
Commitment and Contingencies Disclosure [Line Items]          
Number of defendants | defendant 2        
Settled Litigation | Antelope Valley Groundwater Cases          
Commitment and Contingencies Disclosure [Line Items]          
Number of parties settled, more than | participant   140      
Loss Contingency, Settlement, Percent of Water Use Within the Adjudication Boundary   99.00%      
KWBA | TCWD          
Commitment and Contingencies Disclosure [Line Items]          
Percentage of interest rate held       2.00%