Additional Balance Sheet Detail

6 Months Ended

Jun. 30, 2013

The following table summarizes components of selected balance sheet accounts as of the dates presented:



	As of
	June 30,		December 31,
	2013		2012
Other current assets:
Tubular inventory and well materials	$	2,463	$	4,033
Prepaid expenses	6,617		562
	$	9,080	$	4,595
Other assets:
Debt issuance costs	$	31,601	$	13,186
Assets of supplemental employee retirement plan (“SERP”)	3,364		3,237
Other	1,043		1,511
	$	36,008	$	17,934
Accounts payable and accrued liabilities:
Trade accounts payable	$	71,725	$	37,835
Drilling and other lease operating costs	50,808		37,703
Royalties	23,278		14,390
Production and franchise taxes	7,950		2,874
Compensation - related	4,782		6,853
Interest	17,098		5,828
Preferred stock dividends	1,725		1,687
Other	6,478		4,485
	$	183,844	$	111,655
Other liabilities:
Firm transportation obligation	$	13,806	$	14,333
Asset retirement obligations (“AROs”)	6,172		4,513
Defined benefit pension obligations	1,752		1,821
Postretirement health care benefit obligations	2,764		2,634
Deferred compensation - SERP obligation and other	3,441		3,310
Other	2,777		2,290
	$	30,712	$	28,901