Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 6,452	$ 701
Accounts receivable (less allowance for doubtful accounts of $2,531 and $2,450 at December 31, 2018 and 2017, respectively)		119,397	111,512
Materials and supplies		473	505
Current derivative asset (Note 13)		12,870	721
Current income taxes receivable		2,054	61
Assets held for sale (Note 2)		22,511	0
Prepaid expenses and other		11,356	6,172
Total current assets		175,113	119,672
Oil and natural gas properties, on the full cost method:
Proved properties		6,018,568	5,712,813
Unproved properties not being amortized		330,216	296,764
Drilling equipment		1,284,419	1,593,611
Gas gathering and processing equipment		767,388	726,236
Saltwater disposal systems		68,339	62,618
Corporate land and building		59,081	59,080
Transportation equipment		29,524	29,631
Other		57,507	53,439
Property, plant and equipment, gross, total		8,615,042	8,534,192
Less accumulated depreciation, depletion, amortization, and impairment		6,182,726	6,151,450
Net property and equipment		2,432,316	2,382,742
Goodwill (Note 2)		62,808	62,808
Other assets		27,816	16,230
Total assets	[1]	2,698,053	2,581,452
Current liabilities:
Accounts payable		149,945	112,648
Accrued liabilities (Note 6)		49,664	48,523
Current derivative liabilities (Note 13)		0	7,763
Current portion of other long-term liabilities (Note 7)		14,250	13,002
Total current liabilities		213,859	181,936
Long-term debt less unamortized discount and debt issuance costs (Note 7)		644,475	820,276
Non-current derivative liabilities (Note 13)		293	0
Other long-term liabilities (Note 7)		101,234	100,203
Deferred income taxes (Note 9)		144,748	133,477
Commitments and contingencies (Note 15)		0	0
Shareholders' equity:
Preferred stock, $1.00 par value, 5,000,000 shares authorized, none issued		0	0
Common stock, $0.20 par value, 175,000,000 shares authorized, 54,055,600 and 52,880,134 shares issued as of December 31, 2018 and 2017, respectively		10,414	10,280
Capital in excess of par value		628,108	535,815
Accumulated other comprehensive income (loss) (net of tax ($155) and $39 at December 31, 2018 and 2017, respectively) (Note 17)		(481)	63
Retained earnings		752,840	799,402
Total shareholders' equity attributable to Unit Corporation		1,390,881	1,345,560
Non-controlling interests in consolidated subsidiaries		202,563	0
Total shareholders' equity		1,593,444	1,345,560
Total liabilities and shareholders' equity	[1]	$ 2,698,053	$ 2,581,452

[1] Unit Corporation's consolidated total assets as of December 31, 2018 include current and long-term assets of its variable interest entity (VIE) (Superior) of $41.7 million and $421.6 million, respectively, which can only be used to settle obligations of the VIE. Unit Corporation's consolidated total liabilities as of December 31, 2018 include current and long-term liabilities of the VIE of $42.8 million and $14.7 million, respectively, for which the creditors of the VIE have no recourse to Unit Corporation. See Note 16 – Variable Interest Entity Arrangements.