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Income Taxes (Notes) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes Income tax expense consisted of the following (in thousands):
|  | 2016 |  | 2015 |  | 2014
Current: |  |  |  |  |  |
Federal |  | $ | 21,634 |  |  | $ | 7,272 |  |  | $ | 29,484 |
State |  | 5,289 |  |  | 3,870 |  |  | 4,161 |
|  | 26,923 |  |  | 11,142 |  |  | 33,645 |
Deferred: |  |  |  |  |  |  |  |  |
Federal |  | (105 | ) |  | 13,567 |  |  | 747 |
State |  | (2,302 | ) |  | 202 |  |  | (258 | )
|  | (2,407 | ) |  | 13,769 |  |  | 489 |
Income tax expense |  | $ | 24,516 |  |  | $ | 24,911 |  |  | $ | 34,134 |
The following table provides a reconciliation between the statutory federal income tax rate and our effective income tax rate:
|  | 2016 |  | 2015 |  | 2014
Statutory federal income tax |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State income taxes, net of federal benefit |  | 2.6 |  |  | 3.0 |  |  | 2.5 |
Manufacturing deduction |  | (3.3 | ) |  | (1.7 | ) |  | (3.3 | )
Changes in unrecognized tax benefits |  | 1.2 |  |  | 0.3 |  |  | 0.3 |
Non-taxable acquisition-related transactions |  | — |  |  | (2.6 | ) |  | — |
Other |  | (3.2 | ) |  | (1.0 | ) |  | (1.1 | )
Effective income tax rate |  | 32.3 | % |  | 33.0 | % |  | 33.4 | %
We file income tax returns with the U.S. federal government and various state jurisdictions. In the normal course of business, we are subject to examination by federal and state taxing authorities. We are no longer subject to federal income tax examinations for years prior to 2013 or state income tax examinations prior to 2012. Deferred Income Taxes The tax effects of temporary differences that give rise to deferred income taxes were as follows (in thousands):
|  | 2016 |  | 2015
Deferred tax assets: |  |  |  |
Stock-based compensation |  | $ | 9,834 |  |  | $ | 8,756 |
Deferred rent and lease incentives |  | 8,388 |  |  | 6,977 |
Warranty and returns liabilities |  | 7,948 |  |  | 10,817 |
Net operating loss carryforwards and credits |  | 6,368 |  |  | 7,847 |
Compensation and benefits |  | 4,115 |  |  | 3,788 |
Other |  | 5,264 |  |  | 4,561 |
Total gross deferred tax assets |  | 41,917 |  |  | 42,746 |
Valuation allowance |  | (620 | ) |  | (1,441 | )
Total deferred tax assets after valuation allowance |  | 41,297 |  |  | 41,305 |
Deferred tax liabilities: |  |  |  |
Property and equipment |  | 27,049 |  |  | 26,330 |
Deferred revenue |  | 3,279 |  |  | 5,598 |
Other |  | 6,302 |  |  | 6,341 |
Total gross deferred tax liabilities |  | 36,630 |  |  | 38,269 |
Net deferred tax assets |  | $ | 4,667 |  |  | $ | 3,036 |
At December 31, 2016, we had net operating loss carryforwards for federal purposes of $10.0 million, which will expire between 2025 and 2034, and for state income tax purposes of $14.8 million, which will expire between 2017 and 2036. We evaluate our deferred income taxes quarterly to determine if valuation allowances are required. As part of this evaluation, we assess whether valuation allowances should be established for any deferred tax assets that are not considered more likely than not to be realized, using all available evidence, both positive and negative. This assessment considers, among other matters, the nature, frequency, and severity of historical losses, forecasts of future profitability, taxable income in available carryback periods and tax planning strategies. In making such judgments, significant weight is given to evidence that can be objectively verified. We have provided a $0.6 million valuation allowance resulting primarily from our inability to utilize certain foreign net operating losses, and federal net operating losses associated with our acquisition of BAM Labs, Inc. Unrecognized Tax Benefits Reconciliations of the beginning and ending amounts of unrecognized tax benefits for 2016, 2015 and 2014 were as follows (in thousands):
|  | Federal and State Tax
|  | 2016 |  | 2015 |  | 2014
Beginning balance |  | $ | 2,077 |  |  | $ | 742 |  |  | $ | 474 |
Increases related to current-year tax positions |  | 326 |  |  | 1,277 |  |  | 172 |
Increases related to prior-year tax positions |  | 1,594 |  |  | 113 |  |  | 110 |
Lapse of statute of limitations |  | (333 | ) |  | (55 | ) |  | (14 | )
Settlements with taxing authorities |  | (204 | ) |  | — |  |  | — |
Ending balance |  | $ | 3,460 |  |  | $ | 2,077 |  |  | $ | 742 |
As of December 31, 2016 and January 2, 2016, we had $3.5 million and $2.1 million, respectively, of unrecognized tax benefits, which if recognized, would affect our effective tax rate. The amount of unrecognized tax benefits is not expected to change materially within the next 12 months.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: 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=65882285&loc=d3e32718-109319 Reference 4: 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=65882285&loc=d3e32639-109319 Reference 5: 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=65882285&loc=d3e32537-109319 + Details
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