XML 110 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 10 - Shareholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 29, 2013 | Jan. 01, 2012
Note 10 - Shareholders' Equity (Tables) [Line Items] |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | FISCAL YEAR |
|  | 2011 |
Risk free interest rate |  |  | 0.9 | %
Expected option life (years) |  | 5.75 |
Expected volatility |  |  | 65 | %
Expected dividend yield |  |  | 0.5 | %
|  | FISCAL YEAR |
|  | 2011 |
Risk free interest rate |  |  | 0.9 | %
Expected option life (years) |  |  | 5.75 |
Expected volatility |  |  | 65 | %
Expected dividend yield |  |  | 0.6 | %
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Exercise Price |
Outstanding at December 30, 2012 |  |  | 393,500 |  |  | $ | 8.49 |
Granted |  |  | 0 |  |  |  | 0 |
Exercised |  |  | 201,000 |  |  |  | 9.09 |
Forfeited or cancelled |  |  | 8,500 |  |  |  | 2.71 |
Outstanding at December 29, 2013 (a) |  |  | 184,000 |  |  | $ | 8.18 |
Exercisable at December 29, 2013 (b) |  |  | 184,000 |  |  | $ | 8.18 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  |  |  |  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Number Outstanding at December 29, 2013 |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number Exercisable at December 29, 2013 |  |  | Weighted Average Exercise Price |
| $1.49 | – | 4.00 |  |  | 7,500 |  |  |  | 5.1 |  |  | $ | 1.49 |  |  |  | 7,500 |  |  | $ | 1.49 |
| 4.01 | – | 7.00 |  |  | 77,500 |  |  |  | 5.0 |  |  |  | 4.31 |  |  |  | 77,500 |  |  |  | 4.31 |
| 7.01 | – | 12.00 |  |  | 20,000 |  |  |  | 5.8 |  |  |  | 7.78 |  |  |  | 20,000 |  |  |  | 7.78 |
| 12.01 | – | 14.00 |  |  | 79,000 |  |  |  | 6.6 |  |  |  | 12.47 |  |  |  | 79,000 |  |  |  | 12.47 |
|  |  |  |  |  | 184,000 |  |  |  | 5.8 |  |  | $ | 8.18 |  |  |  | 184,000 |  |  | $ | 8.18 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at December 30, 2012 |  |  | 1,973,500 |  |  | $ | 14.79 |
Granted |  |  | 670,000 |  |  |  | 16.23 |
Vested |  |  | 420,000 |  |  |  | 14.68 |
Forfeited or cancelled |  |  | 516,000 |  |  |  | 14.00 |
Outstanding at December 29, 2013 |  |  | 1,707,500 |  |  | $ | 15.62 |
For 2011 [Member] |  |
Note 10 - Shareholders' Equity (Tables) [Line Items] |  |
Schedule of Stockholders Equity [Table Text Block] |
|  | CLASS A SHARES |  |  | CLASS A AMOUNT |  |  | CLASS B SHARES |  |  | CLASS B AMOUNT |  |  | ADDITIONAL PAID-IN CAPITAL |  |  | RETAINED EARNINGS (DEFICIT) |  |  | PENSION LIABILITY |  |  | FOREIGN CURRENCY TRANSLATION ADJUSTMENT |
|  | (in thousands) |
Balance, at January 2, 2011 |  |  | 57,311 |  |  | $ | 5,729 |  |  |  | 7,145 |  |  | $ | 716 |  |  | $ | 349,662 |  |  | $ | (49,770 | ) |  | $ | (31,196 | ) |  | $ | (26,269 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,721 |  |  |  |  |  |  |  |  |
Conversion of common stock |  |  | 593 |  |  |  | 59 |  |  |  | (593 | ) |  |  | (59 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issuances under employee plans |  |  | 502 |  |  |  | 50 |  |  |  |  |  |  |  |  |  |  |  | 210 |  |  |  |  |  |  |  |  |  |  |  |  |
Other issuances of common stock |  |  |  |  |  |  |  |  |  |  | 527 |  |  |  | 53 |  |  |  | 11,336 |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized stock compensation expense related to restricted stock awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (11,402 | ) |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,231 | ) |  |  |  |  |  |  |  |
Forfeitures and compensation expense related to stock awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,594 |  |  |  |  |  |  |  |  |  |  |  |  |
Pension liability adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,066 | ) |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,614 | )
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (484 | ) |  |  |  |  |  |  |  |
Balance, at January 1, 2012 |  |  | 58,406 |  |  | $ | 5,839 |  |  |  | 7,078 |  |  | $ | 709 |  |  | $ | 361,400 |  |  | $ | (16,764 | ) |  | $ | (36,262 | ) |  | $ | (33,883 | )
For 2012 and 2013 [Member] |  |
Note 10 - Shareholders' Equity (Tables) [Line Items] |  |
Schedule of Stockholders Equity [Table Text Block] |
|  | SHARES |  |  | AMOUNT |  |  | ADDITIONAL PAID-IN CAPITAL |  |  | RETAINED EARNINGS (DEFICIT) |  |  | PENSION LIABILITY |  |  | FOREIGN CURRENCY TRANSLATION ADJUSTMENT |
|  | (in thousands) |
Balance, at January 1, 2012 |  |  | 65,484 |  |  | $ | 6,548 |  |  | $ | 361,400 |  |  | $ | (16,764 | ) |  | $ | (36,262 | ) |  | $ | (33,883 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,943 |  |  |  |  |  |  |  |  |
Stock issuances under employee option plans |  |  | 160 |  |  |  | 16 |  |  |  | 2,030 |  |  |  |  |  |  |  |  |  |  |  |  |
Other issuances of common stock |  |  | 573 |  |  |  | 58 |  |  |  | 7,564 |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized stock compensation expense related to restricted stock awards |  |  |  |  |  |  |  |  |  |  | (7,610 | ) |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,925 | ) |  |  |  |  |  |  |  |
Forfeitures and compensation expense related to stock awards |  |  | (155 | ) |  |  | (16 | ) |  |  | 3,293 |  |  |  |  |  |  |  |  |  |  |  |  |
Pension liability adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 771 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,539 |
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, at December 30, 2012 |  |  | 66,062 |  |  | $ | 6,606 |  |  | $ | 366,677 |  |  | $ | (16,746 | ) |  | $ | (35,491 | ) |  | $ | (25,344 | )
|  | SHARES |  |  | AMOUNT |  |  | ADDITIONAL PAID-IN CAPITAL |  |  | RETAINED EARNINGS (DEFICIT) |  |  | PENSION LIABILITY |  |  | FOREIGN CURRENCY TRANSLATION ADJUSTMENT |
|  | (in thousands) |
Balance, at December 30, 2012 |  |  | 66,062 |  |  | $ | 6,606 |  |  | $ | 366,677 |  |  | $ | (16,746 | ) |  | $ | (35,491 | ) |  | $ | (25,344 | )
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,255 |  |  |  |  |  |  |  |  |
Stock issuances under employee option plans |  |  | 201 |  |  |  | 20 |  |  |  | 1,814 |  |  |  |  |  |  |  |  |  |  |  |  |
Other issuances of common stock |  |  | 670 |  |  |  | 67 |  |  |  | 10,805 |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized stock compensation expense related to restricted stock awards |  |  |  |  |  |  |  |  |  |  | (10,872 | ) |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,283 | ) |  |  |  |  |  |  |  |
Forfeitures and compensation expense related to stock awards |  |  | (622 | ) |  |  | (62 | ) |  |  | 6,173 |  |  |  |  |  |  |  |  |  |  |  |  |
Pension liability adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,409 |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,241 | )
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, at December 29, 2013 |  |  | 66,311 |  |  | $ | 6,631 |  |  | $ | 374,597 |  |  | $ | 24,226 |  |  | $ | (34,082 | ) |  | $ | (30,585 | )

X
- Details
Name: | tile_Note10ShareholdersEquityTablesLineItems
Namespace Prefix: | tile_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
Name: | us-gaap_ScheduleOfStockholdersEquityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration