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Share-Based Compensation - Nonvested Restricted Shares and Other (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2016 USD ($) item $ / shares shares | Jan. 03, 2015 USD ($) $ / shares shares | Dec. 28, 2013 USD ($) shares | Dec. 29, 2012 shares
Additional disclosures |  |  |  |
Additional compensation cost for modified awards | $ | $ 294 |  |  |
1998 Employee Stock Purchase Plan |  |  |  |
Additional disclosures |  |  |  |
Number of shares authorized | 243,000 |  |  |
Purchase price as a percentage of fair market value | 85.00% |  |  |
Offering period |  | 1 year |  |
Shares issued |  | 0 | 0 | 0
Options |  |  |  |
Additional disclosures |  |  |  |
Fair value of options vested | $ | $ 1,500 | $ 1,400 | $ 1,300 |
Unrecognized compensation cost, net of expected forfeitures | $ | $ 4,100 |  |  |
Weighted-average period over which cost is expected to be recognized | 3 years 1 month 6 days |  |  |
Additional disclosures |  |  |  |
Fair value of options vested | $ | $ 1,500 | 1,400 | 1,300 |
Restricted shares |  |  |  |
Additional disclosures |  |  |  |
Fair value of options vested | $ | $ 2,400 | $ 3,200 | $ 3,100 |
Number of vesting installments | item | 4 |  |  |
Unrecognized compensation cost, net of expected forfeitures | $ | $ 6,400 |  |  |
Weighted-average period over which cost is expected to be recognized | 3 years 1 month 6 days |  |  |
Non-vested Restricted Stock and Stock Units, Number of Shares |  |  |  |
Balance at the beginning of the period (in shares) | 286,142 |  |  |
Granted (in shares) | 144,784 |  |  |
Vested (in shares) | (106,504) | (149,195) | (134,384) |
Forfeited (in shares) | (3,009) |  |  |
Balance at the end of the period (in shares) | 321,413 | 286,142 |  |
Non-vested Restricted Stock and Stock Units, Weighted-Average Fair Value |  |  |  |
Balance at the beginning of the period (in dollars per share) | $ / shares | $ 23.72 |  |  |
Granted (in dollars per share) | $ / shares | 22.01 |  |  |
Vested (in dollars per share) | $ / shares | 22.72 |  |  |
Forfeited (in dollars per share) | $ / shares | 28.26 |  |  |
Balance at the end of the period (in dollars per share) | $ / shares | $ 23.17 | $ 23.72 |  |
Additional disclosures |  |  |  |
Fair value of options vested | $ | $ 2,400 | $ 3,200 | $ 3,100 |
Number of shares issuable upon achievement of certain financial performance goals, specified period one | 121,000 |  |  |
Number of shares issuable upon achievement of certain financial performance goals, specified period two | 150,000 |  |  |
Number of shares issuable upon achievement of certain financial performance goals, specified period three | 204,000 |  |  |

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- Definition Represents the number of shares issuable upon achievement of financial performance goals between the first quarter of fiscal 2014 and the fourth quarter of fiscal 2015 under the share-based compensation plan. + References No definition available. + Details
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- Definition Represents the number of shares issuable upon achievement of financial performance goals between the fourth quarter of fiscal 2015 and the third quarter of fiscal 2016 under the share-based compensation plan. + References No definition available. + Details
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- Definition Represents the number of shares issuable upon achievement of financial performance goals between the first quarter of fiscal 2016 and the fourth quarter of fiscal 2017 under the share-based compensation plan. + References No definition available. + Details
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- Definition Represents the number of annual installments that the share-based compensation award vests equally. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + 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
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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