Annual report pursuant to Section 13 and 15(d)

Commitments (Details)

v3.3.1.900
Commitments (Details)
MMBTU / d in Thousands
 12 Months Ended
Apr. 29, 2015
USD ($)
shares
Mar. 13, 2015
Apr. 22, 2014
Nov. 02, 2012
Mar. 11, 1997
USD ($)
well
Dec. 31, 2015
USD ($)
MMBTU / d
well
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Commitments [Line Items]                
Plugging And Abandonment Escrow Account           $ 3,089,000 $ 3,097,000  
Maximum annual contributions per employee (401K Plan)           100.00%    
Cost recognized on defined contribution plan           $ 1,400,000 $ 800,000 $ 600,000
Employment Agreement, Term           3 years    
Employment Agreement, Subsequent Extension       1 year        
Employment Agreement, Notice Period Allowed For Termination       90 days        
Other Commitment           $ 144,210,000    
Purchase Commitment, Total | MMBTU / d           1,452    
Muskie Proppant LLC                
Commitments [Line Items]                
Accrued damages for non-utilization of supply contract obligations           $ 300,000    
Chief Executive Officer                
Commitments [Line Items]                
Other Commitment           400,000    
Employment Agreement, Annual Compensation $ 460,000              
Chief Operating Officer                
Commitments [Line Items]                
Employment Agreement, Term   2 years            
Chief Financial Officer                
Commitments [Line Items]                
Employment Agreement, Term   3 years 3 years          
Management                
Commitments [Line Items]                
Other Commitment           $ 1,200,000    
Minimum                
Commitments [Line Items]                
Minimum matching employer contribution for 401K           3.00%    
Operating lease term (exceeding one year)           1 year    
WCBB                
Commitments [Line Items]                
Purchasing Remaining Percent Interest In Oil And Gas Property         50.00%      
Payments Held For Restricted Cash         $ 18,000      
Significant Plugging Commitment Minimum Number Of Wells To Be Plugged | well         20      
Tenure Of Minimum Wells To Be Plugged         20 years      
Number Of Wells Plugged | well           463    
Restricted Stock | Chief Executive Officer                
Commitments [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Employment Agreement, Annual Grant of Shares | shares 40,000              
Restricted Stock | Chief Executive Officer                
Commitments [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Employment Agreement, Maximum Annual Salary Granted in Options, Percent 500.00%