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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jan. 31, 2014 Subsequent Events | Jan. 31, 2014 Senior Loan Subsequent Events | Jan. 31, 2014 Subordinate Tranche Subsequent Events | Dec. 31, 2012 Vaalco International
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |
Company acquired the noncontrolling interest amount |  |  |  |  |  |  | $ 26,200,000
Noncontrolling interest owned issued and outstanding common stock |  |  |  |  |  |  | 9.99%
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |  |
Maturity period of cash and cash equivalents | three months or less |  |  |  |  |  |
Company's bank guarantees for customs clearance | 2,400,000 | 2,400,000 |  |  |  |  |
Company's charter payment escrow | 800,000 | 800,000 |  |  |  |  |
Funds restricted to secure the Company's drilling obligation | 10,000,000 | 10,000,000 |  |  |  |  |
Date of maturity of certificates of deposit and commercial paper | not exceeding 90 days |  |  |  |  |  |
Gains or Loss on foreign currency transactions | (100,000) | 400,000 | 1,000,000 |  |  |  |
Bad debt expenses | 1,562,000 | 1,621,000 | 4,448,000 |  |  |  |
Loan agreement |  |  |  | $ 65,000,000 | $ 50,000,000 | $ 15,000,000 |
Expiration date of availability period |  |  |  | Dec. 31, 2019 |  |  |
Interest rate, Description |  |  |  | RBL will bear interest at LIBOR plus 3.75% for the senior loan and LIBOR plus 5.75% for the subordinate tranche and is to be paid quarterly. |  |  |
Interest rate at LIBOR plus |  |  |  |  | 3.75% | 5.75% |
Commitment fee in respect of unutilized commitments |  |  |  |  | 1.50% | 2.30% |
Closing fees |  |  |  | 2.50% |  |  |

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