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Stockholders' Equity (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2013 | Jun. 30, 2012 | Jun. 29, 2013 | Jun. 30, 2012
Amounts Reclassified from AOCI |  |  |  |
Interest expense | $ (831) | $ (32) | $ (1,673) | $ (65)
Interest income | 152 | 363 | 487 | 860
Income before income taxes | 18,464 | 17,789 | 38,542 | 34,906
Income tax (provision) benefit | (5,852) | 2,720 | (5,896) | (77)
Net income | 12,612 | 20,509 | 32,646 | 34,829
Reclassifications From Accumulated Other Comprehensive Loss |  |  |  |
Amounts Reclassified from AOCI |  |  |  |
Income before income taxes | 91 | (447) | (90) | (880)
Income tax (provision) benefit | (32) | 156 | 32 | 308
Net income | 59 | (291) | (58) | (572)
Losses on cash flow hedge | Reclassifications From Accumulated Other Comprehensive Loss |  |  |  |
Amounts Reclassified from AOCI |  |  |  |
Rent expense |  | (447) |  | 880
Interest expense | (141) |  | (322) |
Gains on available-for-sales securities | Reclassifications From Accumulated Other Comprehensive Loss |  |  |  |
Amounts Reclassified from AOCI |  |  |  |
Interest income | $ 232 |  | $ 232 |

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