| Income Taxes [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Income Taxes [Abstract] | |
Schedule Of Provision For Income Taxes |
|
|
|
|
|
|
|
|
|
|
|
|
|
For the Years Ended December 31,
|
|
|
|
2016
|
|
|
2015
|
|
|
2014
|
|
Current
|
|
|
|
|
|
|
|
|
|
U.S. federal
|
$
|
64,698
|
|
$
|
55,026
|
|
$
|
48,577
|
|
U.S. state and local
|
|
9,927
|
|
|
8,104
|
|
|
7,285
|
|
Foreign
|
|
393
|
|
|
397
|
|
|
597
|
|
Deferred
|
|
|
|
|
|
|
|
|
|
U.S. federal, state and local
|
|
(6,712)
|
|
|
6,323
|
|
|
6,970
|
|
Foreign
|
|
5
|
|
|
2
|
|
|
8
|
|
Total
|
$
|
68,311
|
|
$
|
69,852
|
|
$
|
63,437
|
|
Schedule Of Temporary Differences That Give Rise To Deferred Tax Assets (Liabilities) |
|
|
|
|
|
|
|
|
|
|
December 31,
|
|
|
|
2016
|
|
|
2015
|
|
Accrued liabilities
|
$
|
43,575
|
|
$
|
39,529
|
|
Stock compensation expense
|
|
9,309
|
|
|
8,555
|
|
Allowance for uncollectible accounts receivable
|
|
1,952
|
|
|
1,729
|
|
State net operating loss carryforwards
|
|
1,811
|
|
|
1,701
|
|
Other
|
|
776
|
|
|
896
|
|
Deferred income tax assets
|
|
57,423
|
|
|
52,410
|
|
Amortization of intangible assets
|
|
(52,133)
|
|
|
(50,136)
|
|
Accelerated tax depreciation
|
|
(14,975)
|
|
|
(18,030)
|
|
Currents assets
|
|
(1,825)
|
|
|
(1,576)
|
|
Market valuation of investments
|
|
(1,341)
|
|
|
(1,375)
|
|
State income taxes
|
|
(793)
|
|
|
(1,465)
|
|
Other
|
|
(639)
|
|
|
(857)
|
|
Deferred income tax liabilities
|
|
(71,706)
|
|
|
(73,439)
|
|
Net deferred income tax liabilities
|
$
|
(14,283)
|
|
$
|
(21,029)
|
|
Schedule Of Significant Changes To Unrecognized Tax Benefits |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016
|
|
|
2015
|
|
|
2014
|
|
Balance at January 1,
|
|
|
|
$
|
1,052
|
|
$
|
980
|
|
$
|
892
|
|
Unrecognized tax benefits due to positions taken in current year
|
|
|
218
|
|
|
260
|
|
|
247
|
|
Decrease due to expiration of statute of limitations
|
|
|
(201)
|
|
|
(188)
|
|
|
(159)
|
|
Balance at December 31,
|
|
|
|
$
|
1,069
|
|
$
|
1,052
|
|
$
|
980
|
|
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,
|
|
|
|
|
|
2016
|
|
|
2015
|
|
|
2014
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Income tax provision calculated using the statutory rate of 35%
|
$
|
61,969
|
|
$
|
63,044
|
|
$
|
56,964
|
|
|
|
State and local income taxes, less federal income tax effect
|
|
6,044
|
|
|
5,787
|
|
|
5,536
|
|
|
|
Nondeductible expenses
|
|
881
|
|
|
1,438
|
|
|
1,290
|
|
|
|
Other--net
|
|
(583)
|
|
|
(417)
|
|
|
(353)
|
|
|
|
Income tax provision
|
$
|
68,311
|
|
$
|
69,852
|
|
$
|
63,437
|
|
|
|
Effective tax rate
|
|
38.6
|
%
|
|
38.8
|
%
|
|
39.0
|
%
|
|
|
Schedule Of Income Taxes Paid |
|
|
|
|
|
|
2016
|
|
$
|
60,905
|
|
2015
|
|
|
62,928
|
|
2014
|
|
|
44,921
|
|