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Note 13 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

		Year Ended December 31,
		2015				2014				2013
Current provision-
Federal		$	7,513			$	21,826			$	7,755
State			2,592				3,531				2,008
			10,105				25,357				9,763
Deferred provision-
Federal			29,561				23,243				20,470
State			2,084				1,986				1,611
			31,645				25,229				22,081
Provision (benefit) for income taxes		$	41,750			$	50,586			$	31,844

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

		Year Ended December 31,
		2015				2014				2013
Income taxes at the federal statutory rate		$	37,733			$	45,691			$	28,371
State income taxes, net of federal benefit			3,053				3,398				2,259
Tax effect of permanent differences			959				1,069				802
Other, net			5				428				412
Provision for income taxes		$	41,750			$	50,586			$	31,844

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

		Year Ended December 31,
		2015				2014				2013
Income tax expense (benefit) related to components of other comprehensive income:
Change in fair value of cash flow swaps		$	92			$	308			$	338
Change in fair value of available-for-sale securities			7				166				–
Total		$	99			$	474			$	338
Paid in capital – stock based compensation		$	337			$	(5,207	)		$	(2,566	)

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

		December 31,
		2015				2014
Deferred income tax (assets) liabilities:
Inventory		$	(6,039	)		$	(6,786	)
Accounts receivable			(187	)			(304	)
Capital lease obligations			(30,993	)			(21,182	)
Stock options			(10,719	)			(8,820	)
Accrued liabilities			(3,685	)			(3,935	)
State net operating loss carry forward			(1,570	)			(1,436	)
State tax credit			(382	)			(354	)
Other			(2,606	)			(1,839	)
Difference between book and tax basis- Depreciation and amortization			244,716				201,495
			188,535				156,839
Valuation allowance			452				409
Net deferred income tax liability		$	188,987			$	157,248

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

		2015				2014				2013
Unrecognized tax benefits at beginning of period		$	2,087			$	1,545			$	1,409
Gross increases – tax positions in current year			692				815				466
Gross increases – tax positions in a prior year			−				−				−
Reductions due to lapse of statute of limitations			(447	)			(273	)			(330	)
Unrecognized tax benefits at end of period		$	2,332			$	2,087			$	1,545

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