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Segment Reporting (Tables) | 12 Months Ended
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Dec. 29, 2017
Segment Reporting [Abstract] |
Segment Reporting Information, by Segment | Segment information is presented for selected data from the statements of income and statements of cash flows for fiscal years 2017, 2016 and 2015. Segment information for selected data from the balance sheets is presented for the fiscal years ended December 29, 2017 and December 30, 2016. Our CEO, the chief operating decision maker, does not review total assets in his evaluation of segment performance and capital allocation.
Revenues |  |  |  |  |  |  |  |  |  |
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |  | 2015 |
Engineering and Other Scientific |  | $ | 277,603 |  | $ | 248,297 |  | $ | 237,959 |
Environmental and Health |  |  | 70,196 |  |  | 66,779 |  |  | 74,873 |
Total revenues |  | $ | 347,799 |  | $ | 315,076 |  | $ | 312,832 |
Operating Income
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |  | 2015 |
Engineering and Other Scientific |  | $ | 93,451 |  | $ | 80,494 |  | $ | 76,817 |
Environmental and Health |  |  | 22,340 |  |  | 18,650 |  |  | 21,810 |
Total segment operating income |  |  | 115,791 |  |  | 99,144 |  |  | 98,627 |
Corporate operating expense |  |  | (43,740) |  |  | (37,233) |  |  | (29,694) |
Total operating income |  | $ | 72,051 |  | $ | 61,911 |  | $ | 68,933 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |  | 2015 |
Engineering and Other Scientific |  | $ | 3,648 |  | $ | 4,309 |  | $ | 3,197 |
Environmental and Health |  |  | 218 |  |  | 124 |  |  | 164 |
Total segment capital expenditures |  |  | 3,866 |  |  | 4,433 |  |  | 3,361 |
Corporate capital expenditures |  |  | 859 |  |  | 9,960 |  |  | 2,018 |
Total capital expenditures |  | $ | 4,725 |  | $ | 14,393 |  | $ | 5,379 |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |  | 2015 |
Engineering and Other Scientific |  | $ | 4,449 |  | $ | 4,429 |  | $ | 3,919 |
Environmental and Health |  |  | 179 |  |  | 181 |  |  | 182 |
Total segment depreciation and amortization |  |  | 4,628 |  |  | 4,610 |  |  | 4,101 |
Corporate depreciation and amortization |  |  | 1,657 |  |  | 1,521 |  |  | 1,378 |
Total depreciation and amortization |  | $ | 6,285 |  | $ | 6,131 |  | $ | 5,479 |
Operations In Different Geographical Areas | Information regarding the Company’s operations in different geographical areas:
Property, Equipment and Leasehold Improvements, net |  |  |  |  |  |  |
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |
United States |  | $ | 33,771 |  | $ | 35,746 |
Foreign Countries |  |  | 1,243 |  |  | 964 |
Total |  | $ | 35,014 |  | $ | 36,710 |
Revenues (1) |  |  |  |  |  |  |  |  |  |
|  | Fiscal Years |
(In thousands) |  | 2017 |  | 2016 |  | 2015 |
United States |  | $ | 308,406 |  | $ | 281,223 |  | $ | 281,618 |
Foreign Countries |  |  | 39,393 |  |  | 33,853 |  |  | 31,214 |
Total |  | $ | 347,799 |  | $ | 315,076 |  | $ | 312,832 |
(1) Geographic revenues are allocated based on the location of the client.
Schedule of Goodwill [Table Text Block] | Below is a breakdown of goodwill, reported by segment as of December 29, 2017 and December 30, 2016:
|  | Environmental |  | Engineering and |  |  |
(In thousands) |  | and Health |  | Other Scientific |  | Total |
Goodwill |  | $ | 8,099 |  | $ | 508 |  | $ | 8,607 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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