Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Summary of Significant Accounting Policies (Textual) [Abstract]
Total capitalized internal costs	$ 3,700,000	$ 7,100,000
Discount rate for estimated future net revenues from proved properties	10.00%
Write-down of oil and gas properties	502,569,000	0
Allowance for doubtful accounts receivable, current	100,000		100,000
Trade Accounts Receivable, Gross	24,700,000		34,800,000
Accounts receivable related to joint interest owners	17,400,000		8,400,000
Severance Tax Receivable	4,800,000		3,100,000
Other Receivables	2,800,000		2,200,000
Percentage of working interest in wells	100.00%
Total amount of supervision fees charged to wells	2,700,000	2,800,000
Inventories carried at cost	3,100,000		3,100,000
Prepaid Expense	4,700,000		3,900,000
Effective Income Tax Rate	14.30%
Outstanding checks included in trade accounts payable	35,700,000		13,700,000
Restricted cash and cash equivalents included in other long term assets	1,000,000		1,000,000
Treasury Stock Reissued at Lower than Repurchase Price	$ 4,900,000
Minimum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Property, Plant and Equipment, Useful Life	2 years
Maximum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Property, Plant and Equipment, Useful Life	20 years