Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details)

v3.20.1
Notes Payable (Details) - Sweetwater IDR Bond [Member]
$ in Millions
Oct. 15, 2013
USD ($)
Oct. 23, 2013
item
Notes Payable    
Proceeds from Issuance of Long-term Debt | $ $ 34.0  
Due Quarterly Commencing From January 1, 2014 [Member]    
Notes Payable    
Fixed interest rate (as a percent)   5.75%
Due Quarterly Commencing From January 1, 2015 [Member]    
Notes Payable    
Number of installments | item   28