Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2014 segment Purchasers	Dec. 31, 2013 Purchasers	Dec. 31, 2012 Purchasers	Mar. 31, 2012
Summary of Significant Accounting Policies [Line Items]
Number of operating segments						1
Billing date						30 days
Outstanding days of account receivable						60 days
Allowance for Doubtful Accounts Receivable, Current						$ 0
Capitalized general and administrative costs						6,400,000	3,700,000	2,600,000
Capitalized interest expense						2,800,000	1,900,000	1,600,000
Present value discounted percent of future net revenues of proved oil and natural gas reserves						10.00%
Average oil and natural gas prices						4.350	93.42	91.21
Net capitalized costs less related deferred income taxes exceeded the full-cost ceiling	13,700,000			21,300,000	2,300,000	0		17,300,000
Impairment charge of net capitalized costs	21,200,000	26,700,000		33,200,000	3,600,000	0	21,229,000	63,475,000
Deferred income tax credit	7,500,000			11,900,000	1,300,000			9,400,000
Number of purchasers						3	5	3
Vested Period						4 years
Stock-based compensation						0
Stock-based compensation (non-cash) expense						5,524,000	3,897,000	140,000
Common stock and restricted stock unit expense						300,000	300,000	100,000
Percentage being realized up on ultimate settlement						50.00%
Dividends declared			68,713					27,643
Machinery and Equipment [Member]
Summary of Significant Accounting Policies [Line Items]
Useful life using the straight-line						30 years
Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Accounts receivable due period						60 days
Useful life						10 years
Vested Period						4 years
Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Accounts receivable due period						30 days
Useful life						5 years
Vested Period						3 years
Class A [Member]
Summary of Significant Accounting Policies [Line Items]
Conversion of Class B common stock to Class A common stock, shares						1,030,700
Class B [Member]
Summary of Significant Accounting Policies [Line Items]
Dividends declared								27,643
Dividends paid									96,356
Class B [Member] | Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative annual dividends per share rate								$ 0.2667
Accounts Receivable [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage						44.00%	81.00%	67.00%
Sales Revenue, Goods, Net [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage						68.00%	87.00%	74.00%
Restricted stock [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						3 years
Stock-based compensation (non-cash) expense						0	100,000	100,000
Restricted stock [Member] | Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						4 years	4 years
Restricted stock [Member] | Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						1 year	1 year
Stock options [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						3 years
Stock-based compensation (non-cash) expense						$ 2,500,000	$ 2,200,000	$ (700,000)
Stock options [Member] | Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						4 years
Stock options [Member] | Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Vested Period						3 years