CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 45,725	$ 139,914
Restricted cash	1,252	1,248
Accounts receivable
Trade, net	87,193	103,025
Joint interest, net	31,905	20,244
Other	23,139	19,686
Assets from price risk management activities	9,655	75,473
Prepaid assets	27,553	38,911
Income tax receivable	9,115	10,701
Other current assets	3,112	7,644
Total current assets	238,649	416,846
Property and equipment:
Proved properties	3,774,531	3,629,430
Unproved properties, not subject to amortization	148,057	108,209
Other property and equipment	33,893	33,191
Total property and equipment	3,956,481	3,770,830
Accumulated depreciation, depletion and amortization	(1,784,196)	(1,719,609)
Total property and equipment, net	2,172,285	2,051,221
Other long-term assets:
Assets from price risk management activities	4,150
Other well equipment inventory	9,993	9,224
Operating lease assets	6,989
Other assets	7,873	2,695
Total assets	2,439,939	2,479,986
Current liabilities:
Accounts payable	62,550	51,019
Accrued liabilities	192,322	188,650
Accrued royalties	23,237	38,520
Current portion of long-term debt	448	443
Current portion of asset retirement obligations	65,884	68,965
Liabilities from price risk management activities	40,502	550
Accrued interest payable	21,077	10,200
Current portion of operating lease liabilities	1,276
Other current liabilities	17,285	22,071
Total current liabilities	424,581	380,418
Long-term liabilities:
Long-term debt, net of discount and deferred financing costs	665,935	654,861
Asset retirement obligations	325,139	313,852
Liabilities from price risk management activities	4,940
Operating lease liabilities	15,620
Other long-term liabilities	103,738	123,359
Total liabilities	1,539,953	1,472,490
Commitments and contingencies (Note 11)
Stockholders' Equity:
Preferred stock, $0.01 par value; 30,000,000 shares authorized; no shares issued or outstanding as of March 31, 2019 and December 31, 2018
Common stock $0.01 par value; 270,000,000 shares authorized; 54,155,805 and 54,155,768 shares issued and outstanding as of March 31, 2019 and December 31, 2018, respectively	542	542
Additional paid-in capital	1,336,216	1,334,090
Accumulated deficit	(436,772)	(327,136)
Total stockholders' equity	899,986	1,007,496
Total liabilities and stockholders' equity	$ 2,439,939	$ 2,479,986