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Note M - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2011
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Domestic |  | $ | 117,497 |  |  | $ | 88,308 |  |  | $ | 54,666 |
Foreign |  |  | 41,295 |  |  |  | 37,549 |  |  |  | 26,123 |
|  | $ | 158,792 |  |  | $ | 125,857 |  |  | $ | 80,789 |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Current: |  |  |  |  |  |  |  |  |
Federal |  | $ | 43,953 |  |  | $ | 36,482 |  |  | $ | 23,896 |
State and local |  |  | 8,560 |  |  |  | 8,253 |  |  |  | 4,403 |
Foreign |  |  | 6,814 |  |  |  | 6,195 |  |  |  | 4,310 |
|  |  | 59,327 |  |  |  | 50,930 |  |  |  | 32,609 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 1,588 |  |  |  | (651 | ) |  |  | (1,748 | )
State and local |  |  | 676 |  |  |  | (147 | ) |  |  | (179 | )
|  |  | 2,264 |  |  |  | (798 | ) |  |  | (1,927 | )
|  | $ | 61,591 |  |  | $ | 50,132 |  |  | $ | 30,682 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Income taxes at federal statutory rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
State and local income taxes - net of federal income tax benefit |  |  | 3.9 |  |  |  | 3.9 |  |  |  | 2.9 |
Nondeductible items |  |  | 0.3 |  |  |  | 0.2 |  |  |  | 0.2 |
Valuation allowance (reversal) |  |  | (0.4 | ) |  |  | 0.5 |  |  |  | — |
Other |  |  | — |  |  |  | 0.2 |  |  |  | (0.1 | )
Effective rate |  |  | 38.8 | % |  |  | 39.8 | % |  |  | 38.0 | %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | December 31, |
|  | 2011 |  |  | 2010 |
Current deferred tax assets: |  |  |  |  |  |
Receivable allowances |  | $ | 7,246 |  |  | $ | 6,068 |
Inventory |  |  | 1,975 |  |  |  | 1,341 |
Unrealized (gain) loss |  |  | (6 | ) |  |  | (60 | )
Accrued expenses |  |  | 496 |  |  |  | 1,729 |
Other |  |  | 595 |  |  |  | 1,094 |
Gross current deferred tax asset |  |  | 10,306 |  |  |  | 10,172 |
Valuation allowance |  |  | (595 | ) |  |  | (1,094 | )
|  |  | 9,711 |  |  |  | 9,078 |
Non-current deferred tax assets (liabilities): |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | (1,889 | ) |  |  | 5,161 |
Deferred compensation |  |  | 4,902 |  |  |  | 2,583 |
Deferred rent |  |  | 2,388 |  |  |  | 2,174 |
Amortization of goodwill |  |  | (2,504 | ) |  |  | (2,142 | )
Other |  |  | (469 | ) |  |  | 68 |
|  |  | 2,428 |  |  |  | 7,844 |
Deferred tax assets |  | $ | 12,139 |  |  | $ | 16,922 |

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- Definition 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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 9 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition 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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition 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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 12 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of income before income tax between domestic and foreign jurisdictions. + References No definition available. + Details
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