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Shareholders' Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 477,299 | $ 414,501 | $ 436,417
Other comprehensive income before reclassifications | 148 | (1,174) | (9,765)
Tax (expense) or benefit | (590) | (264) | 3,311
Amounts reclassified from accumulated other comprehensive income, net of tax | 628 | 1,627 | 114
Ending Balance | 501,009 | 477,299 | 414,501
Accumulated Other Comprehensive Loss |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (5,186) | (5,375) | 965
Ending Balance | (5,000) | (5,186) | (5,375)
Foreign Currency Translation Adjustment |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 322 | 2,223 | 2,913
Other comprehensive income before reclassifications | (1,510) | (1,901) | (690)
Tax (expense) or benefit | 0 | 0 | 0
Amounts reclassified from accumulated other comprehensive income, net of tax | 0 | 0 | 0
Ending Balance | (1,188) | 322 | 2,223
Unrealized Gains Losses) on Marketable Securities |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (2) | 37 | 81
Other comprehensive income before reclassifications | (158) | (60) | (67)
Tax (expense) or benefit | 55 | 21 | 23
Amounts reclassified from accumulated other comprehensive income, net of tax | 0 | 0 | 0
Ending Balance | (105) | (2) | 37
Pension and Post-retirement Liabilities |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (5,506) | (6,763) | (2,140)
Other comprehensive income before reclassifications | 499 | 1,975 | (7,280)
Tax (expense) or benefit | (160) | (718) | 2,657
Amounts reclassified from accumulated other comprehensive income, net of tax | 0 | 0 | 0
Ending Balance | (5,167) | (5,506) | (6,763)
Derivative Financial Instruments |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 0 | (872) | 111
Other comprehensive income before reclassifications | 1,317 | (1,188) | (1,728)
Tax (expense) or benefit | (485) | 433 | 631
Amounts reclassified from accumulated other comprehensive income, net of tax | 628 | 1,627 | 114
Ending Balance | $ 1,460 | $ 0 | $ (872)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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