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Accounts Payable and Accrued Expenses (Tables)
6 Months Ended
Jun. 30, 2018
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses consist of the following (in thousands):

June 30, 2018December 31, 2017
Accounts payable and other accrued expenses$61,808 $75,191 
Accrued interest598 1,385 
Revenues and royalties payable43,859 37,274 
Payroll and benefits
12,819 21,475 
Drilling advances1,466 3,830 
Total accounts payable and accrued expenses$120,550 $139,155