Quarterly report pursuant to Section 13 or 15(d)

Capitalization of Interest - Additional Information (Detail)

v2.4.1.9
Capitalization of Interest - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Debt Disclosure [Abstract]  
Interest Expense Including Capitalized $ 0.5egy_InterestExpenseIncludingCapitalized
Interest expense capitalized $ 0.2us-gaap_InterestCostsCapitalized