Accounting Policy (Detail Textual 1) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]
Limited Liability Company or Limited Partnership, Business, Formation Date	Apr. 28, 2000
Howard Energy Partners [Member]
Schedule of Equity Method Investments [Line Items]
Limited Liability Company or Limited Partnership, Business, Formation Date	Jun. 22, 2011
Investment in limited liability company	35.0
Equity Method Investment, Ownership Percentage	30.60%
Additional Capital Investment	52.3