Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes [Abstract]

Schedule Of Provision For Income Taxes

		For the Years Ended December 31,
		2015		2014		2013
Current
U.S. federal	$	55,026	$	48,577	$	45,348
U.S. state and local		8,104		7,285		7,731
Foreign		397		597		511
Deferred
U.S. federal, state and local		6,323		6,970		(6,995)
Foreign		2		8		7
Total	$	69,852	$	63,437	$	46,602

Schedule Of Temporary Differences That Give Rise To Deferred Tax Assets (Liabilities)

		December 31,
		2015		2014
Accrued liabilities	$	39,529	$	37,879
Stock compensation expense		8,555		11,591
Allowance for uncollectible accounts receivable		1,729		2,779
State net operating loss carryforwards		1,701		1,603
Other		896		807
Deferred income tax assets		52,410		54,659
Amortization of intangible assets		(50,136)		(47,946)
Accelerated tax depreciation		(18,030)		(15,641)
Currents assets		(1,576)		(1,519)
State income taxes		(1,465)		(698)
Market valuation of investments		(1,375)		(2,346)
Other		(857)		(1,023)
Deferred income tax liabilities		(73,439)		(69,173)
Net deferred income tax liabilities	$	(21,029)	$	(14,514)

Schedule Of Significant Changes To Unrecognized Tax Benefits

		2015		2014		2013
Balance at January 1,	$	980	$	892	$	2,646
Unrecognized tax benefits due to positions taken in current year		260		247		219
Decrease due to expiration of statute of limitations		(188)		(159)		(1,973)
Balance at December 31,	$	1,052	$	980	$	892

Schedule Of Difference Between Actual Income Tax Provision For Continuing Operations And Income Tax Provision Calculated At Statutory U.S. Federal Tax Rate

		For the Years Ended December 31,
		2015			2014			2013
Income tax provision calculated using  the statutory rate of 35%	$	63,044		$	56,964		$	43,340
State and local income taxes, less federal income tax effect		5,787			5,536			4,323
Uncertain tax position adjustments		-			-			(1,782)
Nondeductible expenses		1,438			1,290			1,250
Other --net		(417)			(353)			(529)
Income tax provision	$	69,852		$	63,437		$	46,602
Effective tax rate		38.8	%		39.0	%		37.6	%

Schedule Of Income Taxes Paid

2015	$	62,928
2014		44,921
2013		55,827