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Common Stock - Share-based Compensation (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015 | Mar. 21, 2016 | Oct. 23, 2014
Share-Based Compensation |  |  |  |  |
Non-employee compensation expense | $ 146,000 | $ 11,000 | $ 271,000 |  |
Adjustments Related to Tax Withholding for Share-based Compensation | $ 1,880,000 | $ 668,000 | $ 1,222,000 |  |
Common Stock Repurchases and Retirements |  |  |  |  |
Share repurchase program, amount authorized to be repurchased |  |  |  | $ 20,000,000 | $ 30,000,000
Number of shares repurchased and retired | 783,703 | 477,292 | 971,515 |  |
Aggregate price of shares repurchased and retired | $ 19,315,000 | $ 12,806,000 | $ 25,492,000 |  |
Amount available for future repurchases | $ 9,000,000 | 8,100,000 | 20,900,000 |  |
Tender Offer |  |  |  |  |
Number of common stock tendered in conjunction with a modified "Dutch Auction" self tender offer (in shares) | 1,164 |  |  |  |
Purchased price for the common stock tendered in conjunction with a modified "Dutch Auction" self tender offer (dollar per share) | $ 19.75 |  |  |  |
Employees and directors |  |  |  |  |
Share-Based Compensation |  |  |  |  |
Share-based compensation expense | $ 6,700,000 | $ 5,800,000 | $ 5,300,000 |  |
Restricted shares |  |  |  |  |
Share-Based Compensation |  |  |  |  |
Vested (in shares) | 201,905 | 106,504 | 149,195 |  |
Redemption of vested restricted shares in order to pay employee tax withholdings (in shares) | 69,000 | 28,900 | 41,470 |  |
Adjustments Related to Tax Withholding for Share-based Compensation | $ 1,900,000 | $ 700,000 | $ 1,200,000 |  |

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- Definition Number of shares tendered in connection with a modified "Dutch Auction" self tender offer. A tender offer is a broad solicitation by an Entity or a third party to purchase a substantial percentage of another entity's shares or units for a limited period of time. The offer is at a fixed price, usually at a premium over the current market price, and is contingent on shareholders' tendering a fixed number of their shares or units. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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