Mergers, Acquisitions, Exchanges and Divestitures (Tables)

12 Months Ended

Dec. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Business Acquisition, Pro Forma Information [Table Text Block]

The pro forma condensed combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the acquisition taken place on January 1, 2017; furthermore, the financial information is not intended to be a projection of future results.

	Year Ended December 31,
	2018		2017
	(in thousands, except per share data)
Revenues	$	468,949	$	291,991
Net Income (Loss) and Comprehensive Income (Loss)	125,281		(143,530		)
Net Income (Loss) per Common Share, Basic	0.60		(0.81		)
Net Income (Loss) per Common Share, Diluted	0.60		(0.81		)

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table sets forth the Company's purchase price allocation:

	March 19, 2018
	(in thousands)
Purchase Price:
Fair value of common stock issued	$	484,000
Plus: Repayment of Fifth Creek debt	53,900
Total purchase price	537,900
Plus Liabilities Assumed:
Accounts payable and accrued liabilities	25,782
Current unfavorable contract	2,651
Other current liabilities	13,797
Asset retirement obligations	7,361
Long-term deferred tax liability	137,707
Long-term unfavorable contract	4,449
Other noncurrent liabilities	2,354
Total purchase price plus liabilities assumed	$	732,001
Fair Value of Assets Acquired:
Cash	543
Accounts receivable	7,831
Oil and Gas Properties:
Proved oil and gas properties	105,702
Unproved oil and gas properties	609,568
Asset retirement obligations	7,361
Furniture, equipment and other	931
Other noncurrent assets	65
Total asset value	$	732,001

Disposal Groups Excluding Discontinued Operations Disclosure

The carrying amounts by major asset class within the disposal group for the Uinta Basin are summarized below (in thousands):

Assets:
Proved oil and gas properties	$	409,957
Unproved oil and gas properties, excluded from amortization	397
Furniture, equipment and other	1,593
Accumulated depreciation, depletion, amortization and impairment	(304,939		)
Total assets	107,008
Liabilities:
Asset retirement obligations	4,773
Total liabilities	4,773
Net assets	$	102,235