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Note 13 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

Year Ended December 31,		2013				2012				2011
Current:
Federal		$	46,727			$	31,438			$	21,779
State			5,539				3,626				3,561
			52,266				35,064				25,340
Deferred:
Federal			9,010				10,888				7,046
State			(702	)			3,110				674
			8,308				13,998				7,720
Total		$	60,574			$	49,062			$	33,060

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

December 31,		2013				2012
Deferred tax assets:
Deferred revenue and cancellation reserves		$	8,857			$	7,597
Allowances and accruals, including state tax carryforward amounts			31,060				21,340
Interest on derivatives			1,113				1,796
Credits and other			1,937				-
Goodwill			10,331				18,139
Capital loss carryforward			10,893				12,248
Valuation allowance			(11,087	)			(11,641	)
Total deferred tax assets			53,104				49,479
Deferred tax liabilities:
Inventories			(6,722	)			(4,684	)
Property and equipment, principally due to differences in depreciation			(32,563	)			(22,484	)
Prepaid expenses and other			(2,015	)			(1,356	)
Total deferred tax liabilities			(41,300	)			(28,524	)
Total		$	11,804			$	20,955

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

Year Ended December 31,		2013				2012				2011
Federal tax provision at statutory rate		$	58,026			$	44,723			$	30,895
State taxes, net of federal income tax benefit			3,141				4,772				3,021
Non-deductible expenses			1,010				618				208
Permanent differences related to the employee stock purchase program			55				52				105
Net change in valuation allowance			(554	)			(1,200	)			(346	)
General business credits			(440	)			-				-
Other			(664	)			97				(823	)
Income tax provision		$	60,574			$	49,062			$	33,060

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

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