Supplemental Oil and Gas Disclosures (Unaudited) Summary of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue
Revenues	$ 1,399,134	$ 1,401,638	$ 1,409,409	$ 1,191,335	$ 879,112	$ 909,781	$ 856,396	$ 765,439	$ 5,401,516	$ 3,410,728	$ 2,443,066
Expenses
Results of operations of oil and gas producing activities									(153,722)	23,811	13,093
Company
Expenses
Production costs									87	191	29
Depletion and amortization									6	17	66
Results of operations of oil and gas producing activities									63	(157)	193
Company's Share of Laramie Energy
Expenses
Production costs									41,446	42,706	32,606
Impairment of proved properties									163,401	0	0
Depletion and amortization									38,011	26,819	21,277
Results of operations of oil and gas producing activities									(153,785)	23,968	12,900
Oil and Gas | Company
Revenue
Revenues									156	51	288
Oil and Gas | Company's Share of Laramie Energy
Revenue
Revenues									$ 89,073	$ 93,493	$ 66,783