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Shareholders' Equity - Activity in Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2020 | Jul. 05, 2020 | Apr. 05, 2020 | Sep. 29, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Oct. 04, 2020 | Sep. 29, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance |  |  | $ 368,202 |  |  |  | $ 368,202 |
Net loss | $ 5,913 |  |  | $ 26,210 |  |  | (91,545) | $ 62,768
Common Stock, Dividends, Per Share, Declared | $ 0.01 | $ 0.01 | $ 0.065 | $ 0.065 | $ 0.065 | $ 0.065 |  |
Pension liability adjustment | $ (1,471) |  |  | $ 1,076 |  |  | (80) | 1,814
Foreign currency translation adjustment | 23,402 |  |  | (18,585) |  |  | 24,317 | (19,539)
Cash flow hedge unrealized gain (loss) | 864 |  |  | $ (941) |  |  | (5,627) | $ (8,914)
Balance | $ 287,020 |  |  |  |  |  | $ 287,020 |
Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance (in shares) | 58,544 | 58,488 | 58,416 | 58,433 | 60,016 | 59,508 | 58,416 | 59,508
Balance | $ 5,854 | $ 5,849 | $ 5,842 | $ 5,843 | $ 6,002 | $ 5,951 | $ 5,842 | $ 5,951
Stock issuances under employee plans (shares) | 7 | 12 | 220 |  | 2 | 509 |  |
Stock issuances under employee plans | $ 1 | $ 1 | $ 22 |  | $ 0 | $ 51 |  |
Other issuances of common stock (in shares) | 127 | 70 | 107 |  | (1) | 224 |  |
Other issuances of common stock | $ 13 | $ 7 | $ 10 |  | $ 0 | $ 22 |  |
Forfeitures and compensation expense related to stock awards | $ (1) | $ (3) | $ (25) |  | $ (3) | $ (22) |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  | (1,556) |  |  |
Stock Repurchased and Retired During Period, Value |  |  |  |  | $ (156) |  |  |
tile_ForfeituresAndCompensationExpenseRelatedToStockAwardsShares | (8) | (26) | (255) |  | (28) | (225) |  |
Balance (in shares) | 58,670 | 58,544 | 58,488 | 58,433 | 58,433 | 60,016 | 58,670 | 58,433
Balance | $ 5,867 | $ 5,854 | $ 5,849 | $ 5,843 | $ 5,843 | $ 6,002 | $ 5,867 | $ 5,843
ADDITIONAL PAID-IN CAPITAL |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance | 246,323 | 246,378 | 250,306 | 247,221 | 270,655 | 270,269 | 250,306 | 270,269
Stock issuances under employee plans | (1) | (1) | 197 |  | 6 | 379 |  |
Other issuances of common stock | (15) | 2,294 | 1,720 |  | 0 | 3,900 |  |
Unamortized stock compensation expense related to restricted stock awards | 2 | (2,300) | (1,731) |  | 52 | (3,922) |  |
Forfeitures and compensation expense related to stock awards | 703 | (48) | (4,114) | 1,303 | 1,506 | 29 |  |
Stock Repurchased and Retired During Period, Value |  |  |  |  | (24,998) |  |  |
Balance | 247,012 | 246,323 | 246,378 | 248,524 | 247,221 | 270,655 | 247,012 | 248,524
RETAINED EARNINGS |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance | 184,206 | 180,082 | 286,056 | 251,009 | 225,373 | 222,214 | 286,056 | 222,214
Net loss | 5,913 | 4,709 | (102,167) | 26,210 | 29,499 | 7,059 |  |
Balance | 189,533 | 184,206 | 180,082 | 273,421 | 251,009 | 225,373 | 189,533 | 273,421
Cash dividends declared, $0.065 per common share | (586) | (585) | (3,807) | (3,798) | (3,863) | (3,900) |  |
PENSION LIABILITY |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance | (55,309) | (54,967) | (56,700) | (42,872) | (43,701) | (43,610) | (56,700) | (43,610)
Pension liability adjustment | (1,471) | (342) | 1,733 | 1,076 | 829 | (91) |  |
Balance | (56,780) | (55,309) | (54,967) | (41,796) | (42,872) | (43,701) | (56,780) | (41,796)
FOREIGN CURRENCY TRANSLATION ADJUSTMENT |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance | (112,224) | (128,384) | (113,139) | (102,441) | (106,690) | (101,487) | (113,139) | (101,487)
Foreign currency translation adjustment | 23,402 | 16,160 | (15,245) | (18,585) | 4,249 | (5,203) |  |
Balance | (88,822) | (112,224) | (128,384) | (121,026) | (102,441) | (106,690) | (88,822) | (121,026)
CASH FLOW HEDGE |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Balance | (10,654) | (10,303) | (4,163) | (6,647) | (1,980) | 1,326 | (4,163) | 1,326
Cash flow hedge unrealized gain (loss) | 864 | (351) | (6,140) | (941) | (4,667) | (3,306) |  |
Balance | $ (9,790) | $ (10,654) | $ (10,303) | $ (7,588) | $ (6,647) | $ (1,980) | $ (9,790) | $ (7,588)

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