Note 13 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

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

	Year Ended December 31,
	2012		2011		2010
	(in thousands)
Current Tax Provision
Federal	$	29,147	$	29,311	$	23,734
State		4,010		3,131		2,953
		33,157		32,442		26,687
Deferred Tax Provision
Federal		162		1,220		1,386
State		4		145		199
		166		1,365		1,585
Income Tax Provision	$	33,323	$	33,807	$	28,272

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

	December 31,
	2012			2011
	(in thousands)
Current deferred tax asset:
Allowance for doubtful accounts receivable	$	1,022		$	1,174
Accrued expenses		7,490			7,946
		8,512			9,120
Current deferred tax liability:
Unrealized gains on marketable securities		(31,154	)		(22,058	)
Other		(1,832	)		(1,588	)
		(32,986	)		(23,646	)
Net current deferred tax liability	$	(24,474	)	$	(14,526	)
Noncurrent deferred tax asset:
Financial reporting depreciation in excess of tax depreciation	$	4,086		$	968
Deferred gain on sale of assets (net)		(3,135	)		(3,135	)
Tax basis intangible asset in excess of financial reporting basis		663			968
Stock-based compensation		1,682			1,283
Long-term investments		(1,387	)		157
Accrued expenses		2,132			2,129
Deferred revenue		6,523			7,797
Net noncurrent deferred tax asset	$	10,564			10,167

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

	Year Ended December 31,
	2012			2011			2010
	(in thousands)
Tax provision at federal statutory rate	$	31,948		$	34,258		$	28,338
Increase (decrease) in income taxes resulting from:
State, net of federal benefit		3,173			3,185			2,897
Nondeductible expenses		118			188			169
Insurance expense		39			26			(133	)
Other, net		823			57			62
Unrecognized tax benefits		409			85			660
Expiration of statute of limitations		(3,187	)		(3,992	)		(3,721	)
		1,375			(451	)		(66	)
Effective income tax expense	$	33,323		$	33,807		$	28,272

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

	Deferred Tax Asset			Liability For Unrecognized Tax Benefits			Liability For Interest and Penalties			Liability Total
Balance, January 1, 2010	$	11,894		$	17,275		$	5,358		$	22,633
Additions based on tax positions related to the current year		−			1,094			144			1,238
Reductions for tax positions of prior years		(1,510	)		(1,356	)		67			(1,289	)
Reductions for statute of limitation expirations		(295	)		(2,502	)		(1,219	)		(3,721	)
Balance, December 31, 2010		10,089			14,511			4,350			18,861
Additions based on tax positions related to the current year		−			1,452			183			1,635
Additions for tax positions of prior years		(70	)		189			(449	)		(260	)
Reductions for statute of limitation expirations		(93	)		(2,387	)		(1,605	)		(3,992	)
Balance, December 31, 2011		9,926			13,765			2,479			16,244
Additions based on tax positions related to the current year		−			1,695			185			1,880
Additions for tax positions of prior years		728			845			170			1,015
Reductions for statute of limitation expirations		(1,999	)		(4,309	)		(940	)		(5,249	)
Balance, December 31, 2012	$	8,655		$	11,996		$	1,894		$	13,890