Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Our income tax provision for the years ended December 31, 2015, 2014 and 2013, consists of the following (amounts in thousands):

	Current		Deferred		Total
Year ended December 31, 2015:
U.S. Federal	$	85	$	25,206	$	25,291
State		634		5,446		6,080
	$	719	$	30,652	$	31,371
Year ended December 31, 2014:
U.S. Federal	$	576	$	30,753	$	31,329
State		151		6,065		6,216
	$	727	$	36,818	$	37,545
Year ended December 31, 2013:
U.S. Federal	$	1,262	$	16,306	$	17,568
State		1,860		1,579		3,439
	$	3,122	$	17,885	$	21,007

Deferred Income Tax Assets and Liabilities

Significant components of our deferred income tax assets and liabilities as of December 31 are as follows (amounts in thousands):

	2015			2014
Deferred tax assets:
Accounts receivable	$	1,808		$	1,246
Inventories		364			252
Net operating losses		25,881			11,978
AMT and tax credits		3,432			3,210
Sec 263A costs		1,082			1,491
Accrued liabilities		4,419			4,279
Deferred compensation		1,345			2,089
Accrued interest		633			606
Stock-based compensation		521			304
Goodwill and intangible assets		1,359			2,659
Other assets		247			91
		41,091			28,205
Deferred tax liabilities:
Property and equipment		(195,349	)		(151,703	)
Investments		(1,628	)		(1,612	)
		(196,977	)		(153,315	)
Net deferred tax liabilities	$	(155,886	)	$	(125,110	)

Actual Income Tax Expense (Benefit)

The reconciliation between income taxes computed using the statutory federal income tax rate of 35% to the actual income tax expense (benefit) is below for the years ended December 31 (amounts in thousands):

	2015		2014			2013
Computed tax at statutory rates	$	26,487	$	32,439		$	22,801
Permanent items - other		953		1,069			716
Permanent items - excess of tax deductible goodwill		—		—			(4,673	)
State income tax, net of federal tax effect		3,892		4,046			2,651
Increase in uncertain tax positions		39		(9	)		(488	)
Other		—		—			—
	$	31,371	$	37,545		$	21,007

Amounts of Gross Unrecognized Tax Benefits

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follow (in thousands):

	2015		2014
Gross unrecognized tax benefits at January 1	$	5,962	$	5,943
Increases in tax positions taken in prior years		73		42
Decreases in tax positions taken in prior years		—		—
Increases in tax positions taken in current year		—		—
Decreases for tax positions taken in current year		—		—
Settlements with taxing authorities		—		—
Lapse in statute of limitations		—		(23	)
Gross unrecognized tax benefits at December 31	$	6,035	$	5,962