Costs Incurred for Property Acquisition, Exploration and Development (Tables)

6 Months Ended

Jun. 30, 2014

Costs Incurred for Property Acquisition, Exploration and Development

	Six Months Ended June 30, 2014		Year Ended December 31, 2013
	(in thousands)
Acquisitions (b)	$	407,255	$	¾
Acreage purchases		107,379		137,538
Development		512,703		938,668
Exploration:
Drilling		37,261		189,742
Expense		26,092		60,384
Stock-based compensation expense		2,375		4,025
Gas gathering facilities:
Development		7,371		47,086
Subtotal		1,100,436		1,377,443
Asset retirement obligations		5,516		76,373
Total costs incurred	$	1,105,952	$	1,453,816

^(a) Includes costs incurred whether capitalized or expensed.

^(b) See also Note 4 for additional information related to the Conger Exchange. Includes $134.8 million of gas gathering assets.