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Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Constituents of Provision for Income Taxes | The provision for income taxes consisted of the following (in thousands):
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Current: |  |  |  |
Federal |  | $ | 11,284 |  |  | $ | 6,711 |  |  | $ | 5,749 |
State |  |  | 789 |  |  |  | 806 |  |  |  | 199 |
Foreign |  |  | 5,790 |  |  |  | 10,519 |  |  |  | 7,740 |
|  |  | 17,863 |  |  |  | 18,036 |  |  |  | 13,688 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 428 |  |  |  | (812 | ) |  |  | 901 |
State |  |  | 36 |  |  |  | 34 |  |  |  | 217 |
Foreign |  |  | 205 |  |  |  | (10 | ) |  |  | (84 | )
|  |  | 669 |  |  |  | (788 | ) |  |  | 1,034 |
|  | $ | 18,532 |  |  | $ | 17,248 |  |  | $ | 14,722 |
Reconciliation of the United States Federal Statutory Corporate Tax Rate to the Company's Effective Tax Rate or Income Tax Provision | A reconciliation of the United States federal statutory corporate tax rate to the Company’s effective tax rate was as follows:
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Income tax provision at federal statutory rate |  |  | 35 | % |  |  | 35 | % |  |  | 35 | %
State income taxes, net of federal benefit |  |  | 1 |  |  |  | 1 |  |  |  | 1 |
Foreign tax rate differential |  |  | (14 | ) |  |  | (15 | ) |  |  | (15 | )
Tax credit |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Discrete tax events |  |  | — |  |  |  | — |  |  |  | (1 | )
Other |  |  | (1 | ) |  |  | — |  |  |  | — |
Income tax provision |  |  | 21 | % |  |  | 20 | % |  |  | 19 | %
Changes in the Reserve for Income Taxes, Excluding Interest and Penalties | The changes in the reserve for income taxes, excluding interest and penalties, were as follows (in thousands):
Balance of reserve for income taxes as of December 31, 2010 |  | $ | 4,181 |
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in prior periods |  |  | 7 |
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period |  |  | 937 |
Gross amounts of decreases in unrecognized tax benefits relating to settlements with taxing authorities |  |  | (192 | )
Gross amounts of decreases in unrecognized tax benefits as a result of the expiration of the applicable statutes of limitations |  |  | (785 | )
Balance of reserve for income taxes as of December 31, 2011 |  |  | 4,148 |
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in prior periods |  |  | 43 |
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period |  |  | 642 |
Gross amounts of decreases in unrecognized tax benefits relating to settlements with taxing authorities |  |  | (424 | )
Gross amounts of decreases in unrecognized tax benefits as a result of the expiration of the applicable statutes of limitations |  |  | (385 | )
Balance of reserve for income taxes as of December 31, 2012 |  | $ | 4,024 |
Constituents of Deferred Tax Assets | Deferred tax assets consisted of the following (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Current deferred tax assets: |  |  |  |  |  |  |  |
Inventory and revenue related |  | $ | 4,303 |  |  | $ | 5,202 |
Bonuses, commissions, and other compensation |  |  | 1,280 |  |  |  | 1,273 |
Other |  |  | 1,093 |  |  |  | 1,283 |
Gross current deferred tax assets |  |  | 6,676 |  |  |  | 7,758 |
Valuation allowance |  |  | (307 | ) |  |  | (878 | )
Net current deferred tax assets |  | $ | 6,369 |  |  | $ | 6,880 |
Noncurrent deferred tax assets: |  |  |  |  |  |  |  |
Federal and state tax credit carryforwards |  | $ | 9,747 |  |  | $ | 12,274 |
Stock-based compensation expense |  |  | 7,242 |  |  |  | 6,160 |
Depreciation |  |  | 1,819 |  |  |  | 1,798 |
Acquired completed technologies and other intangible assets |  |  | 1,119 |  |  |  | 1,519 |
Unrealized investment gains and losses |  |  | 1,075 |  |  |  | 891 |
Correlative tax relief and deferred interest related to reserves |  |  | 520 |  |  |  | 609 |
Capital loss carryforward |  |  | 373 |  |  |  | 373 |
Acquired in-process technology |  |  | 90 |  |  |  | 178 |
Other |  |  | 1,960 |  |  |  | 1,928 |
Gross noncurrent deferred tax assets |  |  | 23,945 |  |  |  | 25,730 |
Noncurrent deferred tax liabilities: |  |  |  |  |  |  |  |
Nondeductible intangible assets |  |  | (4,945 | ) |  |  | (6,244 | )
Other |  |  | (2,171 | ) |  |  | (1,045 | )
Gross noncurrent deferred tax liabilities |  |  | (7,116 | ) |  |  | (7,289 | )
Valuation allowance |  |  | (1,182 | ) |  |  | (2,522 | )
Net noncurrent deferred tax assets |  | $ | 15,647 |  |  | $ | 15,919 |

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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 -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 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -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 -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 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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