XML 63 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value of Financial Instruments (Details) - Successor - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets measured at fair value on recurring basis $ 0 $ 0
Fair Value, Measurements, Recurring | Commodity Contract | Natural gas swap contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 288,000  
Derivative liabilities   3,784,000
Fair Value, Measurements, Recurring | Commodity Contract | Natural gas swap contracts | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0  
Derivative liabilities   0
Fair Value, Measurements, Recurring | Commodity Contract | Natural gas swap contracts | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 288,000  
Derivative liabilities   3,784,000
Fair Value, Measurements, Recurring | Commodity Contract | Natural gas swap contracts | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 0  
Derivative liabilities   $ 0