Supplemental Gas Data Proved Undeveloped Reserves (Details) MMcf in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) MMcf	Dec. 31, 2015 USD ($) MMcf	Dec. 31, 2014 USD ($) MMcf	Dec. 31, 2013 MMcf	Jan. 02, 2013 MMcf
Reserve Quantities [Line Items]
Payments to Acquire Property, Plant, and Equipment | $	$ 226,820,000	$ 982,934,000	$ 1,459,452,000
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place	(870,884)
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	1,443,642
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	720,146	934,542	1,098,436
Proved Developed and Undeveloped Reserves, Production	394,387	328,657	235,714
Beginning reserves	6,251,648	5,642,989	6,827,616	5,731,214
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates	(99,849)	1,368,909	218,168
Proved Developed and Undeveloped Reserves, Improved Recovery	190,009	(3,159,421)	15,512
proved undeveloped [Member]
Reserve Quantities [Line Items]
Payments to Acquire Property, Plant, and Equipment | $	$ 58,694
Proved Undeveloped Reserve (Volume)	2,568,346				1,945,837
undeveloped reserves transferred to developed	(211,876)
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place	(199,401)
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	547,680
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	669,266
Beginning reserves	2,568,346	1,945,837	3,628,910
Price Changes [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	188,066
Plan and Other Revisions [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	4,906
Proved Developed [Member]
Reserve Quantities [Line Items]
Beginning reserves	3,683,302	3,697,152	3,198,706
Natural Gas [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place	(711,155)
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	1,352,759
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	643,688	840,800
Proved Developed and Undeveloped Reserves, Production	358,474	285,041	216,260
Beginning reserves	5,828,398	5,060,214	6,317,600	5,585,107
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates	21,280	1,052,978	(46,560)
Proved Developed and Undeveloped Reserves, Improved Recovery	179,914	(2,866,123)	15,512
Natural Gas [Member] | proved undeveloped [Member]
Reserve Quantities [Line Items]
Beginning reserves	2,349,934	1,749,320	3,337,694
Natural Gas [Member] | Plan and Other Revisions [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions			979,801
Natural Gas [Member] | Proved Developed [Member]
Reserve Quantities [Line Items]
Beginning reserves	3,478,464	3,310,894	2,979,906
Natural Gas Liquids [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place	(22,382)
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	13,177
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	10,960	13,916
Proved Developed and Undeveloped Reserves, Production	5,119	5,812	2,578
Beginning reserves	60,532	86,212	77,790	21,546
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates	(20,669)	45,993	40,363
Proved Developed and Undeveloped Reserves, Improved Recovery	1,647	(45,675)	0
Natural Gas Liquids [Member] | proved undeveloped [Member]
Reserve Quantities [Line Items]
Beginning reserves	29,866	27,016	45,385
Natural Gas Liquids [Member] | Plan and Other Revisions [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions			18,459
Natural Gas Liquids [Member] | Proved Developed [Member]
Reserve Quantities [Line Items]
Beginning reserves	30,666	59,196	32,405
Crude Oil [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Sales of Minerals in Place	(4,240)
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	1,970
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	1,783	1,707
Proved Developed and Undeveloped Reserves, Production	867	1,458	664
Beginning reserves	10,007	10,915	7,212	2,806
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates	481	6,662	3,756
Proved Developed and Undeveloped Reserves, Improved Recovery	35	(3,208)	0
Crude Oil [Member] | proved undeveloped [Member]
Reserve Quantities [Line Items]
Beginning reserves	6,536	5,736	3,151
Crude Oil [Member] | Plan and Other Revisions [Member]
Reserve Quantities [Line Items]
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions			1,314
Crude Oil [Member] | Proved Developed [Member]
Reserve Quantities [Line Items]
Beginning reserves	3,474	5,180	4,061