INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of components of income tax expense (benefit)

The components of the provision for income taxes for the years ended December 31, 2018, 2017 and 2016 are as follows:



($ in thousands)	2018		2017			2016
Federal:
Current	$	—	$	(376	)	$	—
Deferred	48,738		3,634			(29,082		)
	48,738		3,258			(29,082		)
State:
Current	1,551		74			—
Deferred	966		(204		)	1,110
	2,517		(130		)	1,110
Total expense (benefit)	$	51,255	$	3,128		$	(27,972	)

Schedule of effective income tax rate reconciliation

Reconciliation between the amounts determined by applying the federal statutory rate of 21% for year ended December 31, 2018 and 35% for the years ended December 31, 2017 and 2016 to income tax (expense)/benefit is as follows:



($ in thousands)	2018			2017			2016
Tax at federal statutory rate	$	47,275		$	5,510		$	(28,392	)
State taxes, net of federal benefit	1,874			176			(216		)
Non-deductible expenses	2,423			1,582			498
Stock-based compensation	(426		)	(655		)	—
Valuation allowance	(1,151		)	273			879
Effect of change in enacted Tax Act	—			(3,448		)	—
Other	1,260			(310		)	(741		)
Total expense (benefit)	$	51,255		$	3,128		$	(27,972	)

Schedule of deferred tax assets and liabilities

The significant items giving rise to deferred tax assets (liabilities) at December 31, 2018 and 2017, respectively, are as follows:



($ in thousands)	2018			2017
Deferred Income Tax Assets
Accrued liabilities	$	769		$	1,264
Allowance for doubtful accounts	21			94
Goodwill and other intangible assets	4,010			5,304
Stock‑based compensation	2,632			2,960
Net operating losses	111,580			56,788
Other	63			69
Noncurrent deferred tax assets	119,075			66,479
Total deferred tax assets	119,075			66,479
Valuation allowance	—			(1,151		)
Total deferred tax assets — net	119,075			65,328
Deferred Income Tax Liabilities
Property and equipment	(172,164		)	(68,811		)
Prepaid expenses	(1,194		)	(965		)
Other	—			(131		)
Noncurrent deferred tax liabilities	(173,358		)	(69,907		)
Net deferred tax liability	$	(54,283	)	$	(4,579	)