Note 13 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2017			2016		201 5
Current provision-
Federal	$	22,443		$	15,236	$	7,513
State		4,030			2,300		2,592
		26,473			17,536		10,105
Deferred provision-
Federal		(64,821	)		8,260		29,561
State		2,618			71		2,084
		(62,203	)		8,331		31,645
Provision (benefit) for income taxes	$	(35,730	)	$	25,867	$	41,750

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2017			20 16		2015
Income taxes at the federal statutory rate	$	47,749		$	23,255	$	37,733
State income taxes, net of federal benefit		3,246			1,552		3,053
Tax effect of permanent differences		(4,097	)		887		959
Revaluation of deferred taxes		(82,862	)		−		−
Other, net		234			173		5
(B enefit) provision for income taxes	$	(35,730	)	$	25,867	$	41,750

Schedule of Income Taxes Related to Other Comprehensive Income [Table Text Block]

	Year Ended December 31,
	201 7		2016		201 5
Income tax expense (benefit) related to components of other comprehensive income:
Change in fair value of cash flow swaps	$	−	$	−	$	92
Change in fair value of available-for-sale securities		183		13		7
Total	$	183	$	13	$	99
Paid in capital – stock based compensation	$	−	$	294	$	337

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	201 7			201 6
Deferred income tax (assets) liabilities:
Inventory	$	(3,637	)	$	(5,074	)
Accounts receivable		(157	)		(203	)
Capital lease obligations		(19,480	)		(31,263	)
Stock options		(6,899	)		(11,655	)
Accrued liabilities		(2,533	)		(3,610	)
State net operating loss carry forward		(2,262	)		(1,921	)
State tax credit		(410	)		(380	)
Other		(3,627	)		(5,170	)
Difference between book and tax basis- Depreciation and amortization		174,266			256,352
		135,261			197,076
Valuation allowance		50			255
Net deferred income tax liability	$	135,311		$	197,331

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	201 7			201 6			201 5
Unrecognized tax benefits at beginning of period	$	2,401		$	2,332		$	2,087
Gross increases – tax positions in current year		619			429			692
Gross increases – tax positions in a prior year								−
Reductions due to lapse of statute of limitations		(465	)		(360	)		(447	)
Unrecognized tax benefits at end of period	$	2,555		$	2,401		$	2,332