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Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Receivables [Abstract]        
Oil, natural gas and NGL sales $ 61,140 $ 139,848    
Joint interest billing 60,403 170,937    
Oil and natural gas services 2,417 21,436    
Other 8,274 4,939    
Accounts receivable, gross 132,234 337,160    
Less: allowance for doubtful accounts (4,847) (7,083) $ (11,061) $ (5,635)
Total accounts receivable, net $ 127,387 $ 330,077