Quarterly report pursuant to Section 13 or 15(d)

Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Details)

v3.8.0.1
Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Operating activities:    
Net income $ 27,640 $ 24,299
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, depletion, amortization and accretion 38,081 39,990
Amortization of debt items 466 412
Share-based compensation 1,219 1,928
Derivative gain   (3,955)
Cash receipts on derivative settlements, net   713
Deferred income taxes 109 105
Changes in operating assets and liabilities:    
Oil and natural gas receivables 501 (1,882)
Joint interest receivables 1,919 5,042
Insurance reimbursements   30,100
Prepaid expenses and other assets (6,391) (7,972)
Asset retirement obligation settlements (7,022) (14,499)
Cash advances from JV partners 19,147 (2,531)
Accounts payable, accrued liabilities and other (688) 9,433
Net cash provided by operating activities 74,981 81,183
Investing activities:    
Investment in oil and natural gas properties and equipment (21,117) (23,338)
Changes in operating assets and liabilities associated with investing activities (17,154) 1,168
Deposit for acquisition (3,000)
Purchases of furniture, fixtures and other   (853)
Net cash used in investing activities (41,271) (23,023)
Financing activities:    
Other   (245)
Net cash used in financing activities (2,057) (2,301)
Increase in cash and cash equivalents 31,653 55,859
Cash and cash equivalents, beginning of period 99,058 70,236
Cash and cash equivalents, end of period 130,711 126,095
Parent Company    
Operating activities:    
Net income 30,501 25,030
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, depletion, amortization and accretion 19,420 19,154
Amortization of debt items 466 412
Share-based compensation 1,219 1,928
Derivative gain   (3,955)
Cash receipts on derivative settlements, net   713
Deferred income taxes 109 105
Earnings of affiliates (22,167) (17,527)
Changes in operating assets and liabilities:    
Oil and natural gas receivables 1,823 (2,004)
Joint interest receivables 1,919 5,042
Insurance reimbursements   30,100
Income taxes (5,186) (5,451)
Prepaid expenses and other assets 25,275 (6,927)
Asset retirement obligation settlements (5,633) (12,940)
Cash advances from JV partners 13,129 (2,531)
Accounts payable, accrued liabilities and other 2,403 49,295
Net cash provided by operating activities 63,278 80,444
Investing activities:    
Investment in oil and natural gas properties and equipment (10,674) (23,593)
Changes in operating assets and liabilities associated with investing activities (15,894) 2,162
Deposit for acquisition (3,000)  
Purchases of furniture, fixtures and other   (853)
Net cash used in investing activities (29,568) (22,284)
Financing activities:    
Other   (245)
Net cash used in financing activities (2,057) (2,301)
Increase in cash and cash equivalents 31,653 55,859
Cash and cash equivalents, beginning of period 99,058 70,236
Cash and cash equivalents, end of period 130,711 126,095
Guarantor Subsidiaries    
Operating activities:    
Net income 22,167 17,527
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, depletion, amortization and accretion 15,814 20,105
Changes in operating assets and liabilities:    
Oil and natural gas receivables (1,322) 122
Income taxes 5,186 5,451
Prepaid expenses and other assets (31,783) (42,395)
Asset retirement obligation settlements (1,389) (1,559)
Cash advances from JV partners 6,018  
Accounts payable, accrued liabilities and other (4,965) 1,488
Net cash provided by operating activities 9,726 739
Investing activities:    
Investment in oil and natural gas properties and equipment (7,496) 255
Changes in operating assets and liabilities associated with investing activities (2,230) (994)
Net cash used in investing activities (9,726) (739)
Non-Guarantor Adjustments    
Operating activities:    
Net income (14)  
Changes in operating assets and liabilities:    
Prepaid expenses and other assets 1,991  
Net cash provided by operating activities 1,977  
Investing activities:    
Investment in oil and natural gas properties and equipment (2,947)  
Changes in operating assets and liabilities associated with investing activities 970  
Net cash used in investing activities (1,977)  
11.00% 1.5 Lien Term Loan, Due November 2019    
Financing activities:    
Payment of interest (2,057) (2,056)
11.00% 1.5 Lien Term Loan, Due November 2019 | Parent Company    
Financing activities:    
Payment of interest (2,057) (2,056)
Eliminations    
Operating activities:    
Net income (25,014) (18,258)
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation, depletion, amortization and accretion 2,847 731
Earnings of affiliates 22,167 17,527
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (1,874) 41,350
Accounts payable, accrued liabilities and other $ 1,874 $ (41,350)