Acquisitions, Divestitures, and Assets Held for Sale Fair Value of Acquired Properties (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Net Assets Acquired [Table Text Block]

The Company determined that both of these acquisitions met the criteria of a business combination under Accounting Standards Codification (“ASC”) Topic 805, Business Combinations. The Company allocated the final adjusted purchase price to the acquired assets and liabilities based on fair value as of the respective acquisition dates, as summarized in the table below. Refer to Note 11 – Fair Value Measurements for additional discussion on the valuation techniques used in determining the fair value of acquired properties.

	Acquisition #1			Acquisition #2
	As of September 24, 2014			As of October 15, 2014
Purchase Price	(in thousands)
Cash consideration	$	321,807		$	84,836
Fair value of assets and liabilities acquired:
Proved oil and gas properties	$	203,467		$	54,612
Unproved oil and gas properties	126,588			29,610
Total fair value of oil and gas properties acquired	330,055			84,222
Working capital	(6,135		)	2,232
Asset retirement obligation	(2,113		)	(1,618		)
Total fair value of net assets acquired	$	321,807		$	84,836