CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 12,796	$ 17,864
Accounts receivable, net of allowance for doubtful accounts	52,471	66,038
Derivative assets	7,182	34,932
Income taxes receivable	3,707	2,471
Other current assets	4,733	5,125
Total current assets	80,889	126,430
Property and equipment, net (full cost method)	1,038,687	927,994
Derivative assets	2,756	10,100
Deferred income taxes	0	1,949
Other assets	7,412	2,481
Total assets	1,129,744	1,068,954
Current liabilities
Accounts payable and accrued liabilities	111,993	103,700
Derivative liabilities	14,203	991
Total current liabilities	126,196	104,691
Other liabilities	8,236	5,533
Deferred income taxes	81	0
Derivative liabilities	2,201	0
Long-term debt, net	531,476	511,375
Commitments and contingencies (Note 12)
Shareholders’ equity:
Preferred stock of $0.01 par value – 5,000,000 shares authorized; none issued	0	0
Common stock of $0.01 par value – 45,000,000 shares authorized; 15,107,265 and 15,080,594 shares issued as of June 30, 2019 and December 31, 2018, respectively	151	151
Paid-in capital	198,997	197,630
Retained earnings	262,326	249,492
Accumulated other comprehensive income	80	82
Total shareholders’ equity	461,554	447,355
Total liabilities and shareholders’ equity	$ 1,129,744	$ 1,068,954