Additional Balance Sheet Detail (Tables)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Components of Selected Balance Sheet Accounts

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

	As of
	March 31,		December 31,
	2015		2014
Other current assets:
Tubular inventory and well materials	$	5,323	$	5,802
Prepaid expenses	4,267		4,215
Other	97		97
	$	9,687	$	10,114
Other assets:
Assets of supplemental employee retirement plan (“SERP”)	4,216		4,123
Other	95		95
	$	4,311	$	4,218
Accounts payable and accrued liabilities:
Trade accounts payable	$	121,891	$	174,496
Drilling and other lease operating costs	47,131		68,842
Royalties	25,971		27,883
Compensation – related	4,313		9,197
Interest	37,630		15,555
Preferred stock dividends	6,067		6,067
Other	2,063		10,187
	$	245,066	$	312,227
Other liabilities:
Deferred gains on sale of assets	$	90,463	$	90,569
Firm transportation obligation	11,723		12,042
Asset retirement obligations (“AROs”)	6,049		5,889
Defined benefit pension obligations	1,565		1,753
Postretirement health care benefit obligations	914		890
Compensation – related	7,612		7,631
Deferred compensation – SERP obligations and other	4,270		4,183
Other	928		929
	$	123,524	$	123,886