Additional Balance Sheet Detail

6 Months Ended

Jun. 30, 2014

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



	As of
	June 30,		December 31,
	2014		2013
Other current assets:
Tubular inventory and well materials	$	2,122	$	2,271
Prepaid expenses	3,409		3,653
Other	100		—
	$	5,631	$	5,924
Other assets:
Debt issuance costs	$	28,339	$	30,239
Assets of supplemental employee retirement plan (“SERP”)	3,951		3,734
Other	563		562
	$	32,853	$	34,535
Accounts payable and accrued liabilities:
Trade accounts payable	$	112,835	$	120,278
Drilling and other lease operating costs	42,923		51,529
Royalties	45,089		39,929
Production and franchise taxes	5,198		5,338
Compensation - related	10,003		8,584
Interest	15,602		15,718
Preferred stock dividends	1,329		1,725
Liabilities associated with assets held for sale	1,224		—
Other	6,051		4,903
	$	240,254	$	248,004
Other liabilities:
Deferred gain on sale of assets	$	9,989	$	—
Firm transportation obligation	12,533		13,245
Asset retirement obligations	5,669		6,437
Defined benefit pension obligations	1,491		1,579
Postretirement health care benefit obligations	1,112		1,023
Deferred compensation - SERP obligations and other	4,216		3,883
Other	9,891		7,219
	$	44,901	$	33,386