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Income Taxes (Tables) | 12 Months Ended
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Dec. 30, 2017
Income Tax Disclosure [Abstract] |
Components of Income Tax Provision (Benefit) | The components of the income tax provision (benefit) are as follows:
(in thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 56,641 |  |  | $ | 61,251 |  |  | $ | 55,140 |
State |  |  | 8,293 |  |  |  | 5,948 |  |  |  | 3,578 |
Foreign |  |  | 379 |  |  |  | - |  |  |  | - |
|  |  | 65,313 |  |  |  | 67,199 |  |  |  | 58,718 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 4,582 |  |  |  | (4,563 | ) |  |  | (4,874 | )
State |  |  | 343 |  |  |  | (325 | ) |  |  | (232 | )
Foreign |  |  | (249 | ) |  |  | - |  |  |  | - |
|  |  | 4,676 |  |  |  | (4,888 | ) |  |  | (5,106 | )
Total |  | $ | 69,989 |  |  | $ | 62,311 |  |  | $ | 53,612 |
Reconciliation of Income Taxes at Statutory Tax Rate to Company's Effective Tax Rate | The following is a reconciliation of income taxes at the statutory tax rate to the Company's effective tax rate:
|  | 2017 |  |  | 2016 |  |  | 2015 |
Federal taxes at statutory rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
State taxes, net of federal tax benefit |  |  | 3.4 |  |  |  | 2.2 |  |  |  | 1.8 |
Research and development tax credit |  |  | (0.3 | ) |  |  | (0.2 | ) |  |  | (0.2 | )
Tax reform |  |  | 2.5 |  |  |  | - |  |  |  | - |
Other |  |  | (1.0 | ) |  |  | — |  |  |  | 0.1 |
Effective tax rate |  |  | 39.6 | % |  |  | 37.0 | % |  |  | 36.7 | %
Change in Uncertain Tax Benefits | The following table summarizes the change in uncertain tax benefits for the three years ended December 30, 2017:
(in thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Balance at beginning of year |  | $ | 3,567 |  |  | $ | 1,855 |  |  | $ | 1,163 |
Reductions due to lapses in statutes of limitations |  |  | (181 | ) |  |  | — |  |  |  | — |
Reductions due to tax positions settled |  |  | (4,543 | ) |  |  | (109 | ) |  |  | (177 | )
Reductions due to reversals of prior year positions |  |  | — |  |  |  | (212 | ) |  |  | (20 | )
Additions based on tax positions taken during the prior period |  |  | 3,005 |  |  |  | — |  |  |  | — |
Additions based on tax positions taken during the current period |  |  | 453 |  |  |  | 2,033 |  |  |  | 889 |
Balance at end of year |  | $ | 2,301 |  |  | $ | 3,567 |  |  | $ | 1,855 |
Reconciliation of Deferred Tax Assets and Liabilities | Deferred income taxes result from timing differences in the recognition of revenue and expense for tax and financial statement purposes. The sources of temporary differences are as follows:
(in thousands) |  | December 30, 2017 |  |  | December 31, 2016 |
Assets: |  |  |  |  |  |  |  |
Inventories |  | $ | 7,335 |  |  | $ | 10,337 |
Accounts receivable |  |  | 11,732 |  |  |  | 20,216 |
Accrued expenses |  |  | 1,664 |  |  |  | 2,935 |
Other |  |  | 261 |  |  |  | 786 |
Gross deferred tax assets |  |  | 20,992 |  |  |  | 34,274 |
Liabilities: |  |  |  |  |  |  |  |
Depreciation |  |  | 7,936 |  |  |  | 11,988 |
Goodwill and intangible assets |  |  | 11,776 |  |  |  | 9,857 |
Gross deferred tax liabilities |  |  | 19,712 |  |  |  | 21,845 |
Net deferred tax assets |  | $ | 1,280 |  |  | $ | 12,429 |

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