Supplemental Gas Data Results of Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Production Revenue	$ 740,869	$ 660,442	$ 751,767
Sales-Gas Royalty Interests	63,202	49,405	66,929
Sales-Purchased Gas	6,531	3,316	4,344
Total Revenue	810,602	713,163	823,040
Lifting Costs	96,600	90,835	106,477
Production Tax Expense	28,677	26,145	26,261
Gathering Costs	201,023	160,575	142,339
Gas Royalty Interests Costs	53,028	38,867	59,331
Other Costs		39,029	18,095
Purchased Gas Costs	4,837	2,711	3,831
DD&A	229,562	202,956	206,821
Total Costs	723,979	608,740	623,556
Pre-tax Operating Income	86,623	104,423	199,484
Income Taxes	32,917	39,827	79,873
Results of Operations for Producing Activities excluding Corporate and Interest Costs	53,706	64,596	119,611
Cnx Gas Guarantor [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Sales-Gas Royalty Interests	63,202	49,405	4,344
Sales-Purchased Gas	6,531	3,316	66,929
Gas Royalty Interests Costs	53,069	38,922	59,377
Selling, General and Administrative Expenses	49,092	47,567	60,355
Other Costs	61,119
Purchased Gas Costs	$ 4,837	$ 2,711	$ 3,831