Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended				6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014 Stock Options [Member]	Mar. 31, 2013 Restricted stock [Member]	Jun. 30, 2014 Restricted stock [Member]	Jun. 30, 2014 Class B [Member] Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Income Tax Expense Recorded			$ 0
Summary of Significant Accounting Policies (Textual) [Abstract]
Cumulative annual dividends per share rate												$ 0.66
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total options to purchase shares of the Company's common stock and restricted stock excluded from the calculations									1,293,568	570,078	139,963
Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Capitalized general and administrative costs	1,600,000	700,000	2,800,000	1,400,000
Capitalized interest expense	(700,000)	(500,000)	(1,400,000)	(800,000)
Present value discounted percent of future net revenues of proved oil and natural gas reserves			10.00%
Average oil and natural gas prices					96.75	4.104	88.13	3.444
Net capitalized costs less related deferred income taxes exceeded the full-cost ceiling				13,700,000
Impairment charge of net capitalized costs	0	0	0	21,229,000
Deferred income tax credit				$ 7,500,000