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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information 2 (Detail) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
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Jun. 08, 2021 $ / shares shares | Aug. 04, 2021 MMBTU $ / MMBTU | Jun. 30, 2021 USD ($) $ / shares $ / EquityUnit shares | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) product $ / shares $ / EquityUnit shares | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) shares
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Fair value of derivative net liability |  |  | $ 1,000,000.0 |  | $ 1,000,000.0 |  |
Cash flow hedges derivative instruments |  |  | 0 |  | 0 |  |
Stock-based compensation expense recognized |  |  |  |  | $ 3,489,000 | $ 2,982,000 |
Number of primary products | product |  |  |  |  | 2 |  |
Contract cash settlement max days |  |  |  |  | 25 days |  |
Contract cancellable notice term |  |  |  |  | 30 days |  |
Oil and gas sales |  |  | $ 144,358,000 |  | $ 144,358,000 |  | $ 125,016,000
Natural Gas Swap Contract | Subsequent Event |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Volume (in MMBTU) | MMBTU |  | 2,750,000 |  |  |  |  |
Average price (in dollars per MMBtu) | $ / MMBTU |  | 3.00 |  |  |  |  |
Natural Gas Collar Contract | Subsequent Event |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Volume (in MMBTU) | MMBTU |  | 6,350,000 |  |  |  |  |
Average floor | $ / MMBTU |  | 2.85 |  |  |  |  |
Average ceiling | $ / MMBTU |  | 5.13 |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Granted (in shares) | shares | 473,162 |  |  |  |  |  |
Value per share (in dollars per share) | $ / shares | $ 6.05 |  |  |  |  |  |
Shares of unvested restricted stock outstanding (in shares) | shares |  |  | 1,305,368 |  | 1,305,368 |  | 1,038,006
Weighted average grant date fair value of stock grants per share (in dollars per share) | $ / shares |  |  | $ 5.96 |  | $ 5.96 |  |
Unrecognized compensation cost related to unvested restricted stock |  |  | $ 5,700,000 |  | $ 5,700,000 |  |
Period in which compensation cost expected to be recognized |  |  |  |  | 2 years 1 month 6 days |  |
Potential Performance Shares (PSU) |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Granted (in shares) | shares | 220,929 |  |  |  |  |  |
Value per share (in dollars per share) | $ / shares | $ 8.56 |  |  |  |  |  |
Period in which compensation cost expected to be recognized |  |  |  |  | 2 years |  |
Number of performance stock units ("PSUs") outstanding (in shares) | shares |  |  | 1,357,417 |  | 1,357,417 |  |
Weighted average grant date fair value of PSUs per unit (in dollars per share) | $ / EquityUnit |  |  | 9.21 |  | 9.21 |  |
Minimum final number of shares of common stock issuable based on performance multiplier (in shares) | shares |  |  |  |  | 0 |  |
Maximum final number of shares of common stock issuable based on performance multiplier (in shares) | shares |  |  |  |  | 2,714,834 |  |
Unrecognized expense, performance share units |  |  |  |  | $ 5,000,000.0 |  |
General and Administrative Expense |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense recognized |  |  | $ 1,800,000 | $ 1,600,000 | 3,500,000 | $ 3,000,000.0 |
Interest Rate Swap Contracts |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Outstanding under the bank credit facility |  |  | $ 500,000,000.0 |  | $ 500,000,000.0 |  |
Interest Rate Swap Contracts | LIBOR |  |  |  |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Outstanding bank credit facility percentage |  |  |  |  | 0.33% |  |

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