Related Party Transaction (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]
Sale of Stock, Description of Transaction			20,125,000
Shares Issued, Price Per Share	$ 22.00		$ 22.00
Excess Stock, Shares Authorized	2,625,000		2,625,000
Proceeds from Sale of Equity Method Investments			$ 412,741
Offering Costs, Partnership Interests			28,779
Other General Expense			1,230
Proceeds from Sales of Business, Affiliate and Productive Assets			203,986,000
CONE [Member]
Related Party Transaction [Line Items]
Due from Related Parties	11,435,000		11,435,000		5,448,000
Related Party Transaction, Expenses from Transactions with Related Party	17,794,000	9,689,000	44,001,000	24,470,000
Reimbursement for CONE Expenses [Member] | CONE [Member]
Related Party Transaction [Line Items]
Due from Related Parties	(913,000)		(913,000)		(2,168,000)
Reimbursement for Services Provided to Cone [Member] | CONE [Member]
Related Party Transaction [Line Items]
Due from Related Parties	(122,000)		(122,000)		(265,000)
CONE Capital Reimbursement [Member] | CONE [Member]
Related Party Transaction [Line Items]
Due from Related Parties	(2,789,000)		(2,789,000)		0
CONE Gathering Fees [Member] | CONE [Member]
Related Party Transaction [Line Items]
Due to Related Parties, Current	$ 15,259,000		$ 15,259,000		$ 7,881,000