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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional paid-in capital [Member] | Accumulated other comprehensive income (loss) [Member] | Retained earnings [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 29, 2017 | $ 289,088 |  | $ 66 | $ 210,230 | $ (2,029) | $ 303,990 | $ (223,169)
Balances (in shares) at Dec. 29, 2017 |  |  | 65,707,000 |  |  |  | 14,169,000
Employee stock purchase plan | 1,474 |  |  | 1,161 |  |  | $ 313
Employee stock purchase plan (in shares) |  |  |  |  |  |  | (32,000)
Amortization of unrecognized stock-based compensation | 8,550 |  |  | 8,550 |  |  |
Purchase of treasury shares | (27,915) |  |  |  |  |  | $ (27,915)
Purchase of treasury shares (in shares) |  |  |  |  |  |  | 562,000
Foreign currency translation adjustments | (1,015) |  |  |  | (1,015) |  |
Grant of restricted stock units to settle accrued bonus | 7,643 |  |  | 7,643 |  |  |
Settlement of restricted stock units | (8,839) |  |  | (1,107) |  | (5,892) | $ (1,840)
Settlement of restricted stock units (in shares) |  |  |  |  |  |  | (491,000)
Unrealized gain (loss) on investments | 191 |  |  |  | 191 |  |
Dividends and dividend equivalent rights | (27,522) |  |  | 806 |  | (28,328) |
Net income | 72,254 |  |  |  |  | 72,254 |
Balance at Dec. 28, 2018 | 313,909 |  | $ 66 | 227,283 | (2,853) | 342,024 | $ (252,611)
Balances (in shares) at Dec. 28, 2018 |  |  | 65,707,000 |  |  |  | 14,208,000
Employee stock purchase plan | 1,668 |  |  | 1,384 |  |  | $ 284
Employee stock purchase plan (in shares) |  |  |  |  |  |  | (27,000)
Exercise of stock options | 1,561 |  |  | (141) |  |  | $ 1,702
Exercise of stock options (in shares) |  |  |  |  |  |  | (166,000)
Amortization of unrecognized stock-based compensation | 8,710 |  |  | 8,710 |  |  |
Purchase of treasury shares | (21,957) |  |  |  |  |  | $ (21,957)
Purchase of treasury shares (in shares) |  |  |  |  |  |  | 342,000
Foreign currency translation adjustments | 145 |  |  |  | 145 |  |
Reclassification adjustment for currency translation adjustments on planned disposal of a subsidiary | 601 |  |  |  | 601 |  |
Grant of restricted stock units to settle accrued bonus | 7,947 |  |  | 7,947 |  |  |
Settlement of restricted stock units | (11,183) |  |  | (961) |  | (5,146) | $ (5,076)
Settlement of restricted stock units (in shares) |  |  |  |  |  |  | (406,000)
Unrealized gain (loss) on investments | 347 |  |  |  | 347 |  |
Dividends and dividend equivalent rights | (33,957) |  |  | 713 |  | (34,670) |
Net income | 82,460 |  |  |  |  | 82,460 |
Balance at Jan. 03, 2020 | 350,251 |  | $ 66 | 244,935 | (1,760) | 384,668 | $ (277,658)
Balances (in shares) at Jan. 03, 2020 |  |  | 65,707,000 |  |  |  | 13,951,000
Employee stock purchase plan | 1,791 |  |  | 1,536 |  |  | $ 255
Employee stock purchase plan (in shares) |  |  |  |  |  |  | (24,000)
Exercise of stock options | $ 4,940 |  |  | 1,996 |  |  | $ 2,944
Exercise of stock options (in shares) | (283,755) | [1] |  |  |  |  | (284,000)
Amortization of unrecognized stock-based compensation | $ 9,165 |  |  | 9,165 |  |  |
Purchase of treasury shares | (40,049) |  |  |  |  |  | $ (40,049)
Purchase of treasury shares (in shares) |  |  |  |  |  |  | 636,000
Foreign currency translation adjustments | 65 |  |  |  | 65 |  |
Grant of restricted stock units to settle accrued bonus | 8,645 |  |  | 8,645 |  |  |
Settlement of restricted stock units | (15,263) |  |  | (1,460) |  | (4,538) | $ (9,265)
Settlement of restricted stock units (in shares) |  |  |  |  |  |  | (376,000)
Unrealized gain (loss) on investments | (237) |  |  |  | (237) |  |
Dividends and dividend equivalent rights | (40,362) |  |  | 511 |  | (40,873) |
Net income | 82,552 |  |  |  |  | 82,552 |
Balance at Jan. 01, 2021 | $ 361,498 |  | $ 66 | $ 265,328 | $ (1,932) | $ 421,809 | $ (323,773)
Balances (in shares) at Jan. 01, 2021 |  |  | 65,707,000 |  |  |  | 13,903,000
[1] | Does not include restricted stock or employee stock purchase plans.

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