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v2.4.1.9

Segment Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2015 | Oct. 03, 2014 | Jul. 04, 2014 | Apr. 04, 2014 | Jan. 03, 2014 | Sep. 27, 2013 | Jun. 28, 2013 | Mar. 29, 2013 | Jan. 02, 2015 | Jan. 03, 2014 | Dec. 28, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 73,611 us-gaap_Revenues | $ 78,557 us-gaap_Revenues | $ 76,574 us-gaap_Revenues | $ 75,962 us-gaap_Revenues | $ 72,772 us-gaap_Revenues | $ 75,231 us-gaap_Revenues | $ 75,505 us-gaap_Revenues | $ 72,660 us-gaap_Revenues | $ 304,704 us-gaap_Revenues | [1] | $ 296,168 us-gaap_Revenues | [1] | $ 292,653 us-gaap_Revenues | [1]
Operating Income | 14,133 us-gaap_OperatingIncomeLoss | 19,238 us-gaap_OperatingIncomeLoss | 16,084 us-gaap_OperatingIncomeLoss | 14,094 us-gaap_OperatingIncomeLoss | 12,342 us-gaap_OperatingIncomeLoss | 15,160 us-gaap_OperatingIncomeLoss | 17,593 us-gaap_OperatingIncomeLoss | 10,851 us-gaap_OperatingIncomeLoss | 63,549 us-gaap_OperatingIncomeLoss |  | 55,946 us-gaap_OperatingIncomeLoss |  | 57,620 us-gaap_OperatingIncomeLoss |
Capital Expenditures |  |  |  |  |  |  |  |  | 4,947 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |  | 6,226 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |  | 4,942 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
Depreciation and Amortization |  |  |  |  |  |  |  |  | 5,404 us-gaap_DepreciationAndAmortization |  | 4,951 us-gaap_DepreciationAndAmortization |  | 4,711 us-gaap_DepreciationAndAmortization |
Engineering and Other Scientific |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 223,384 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 215,972 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 213,304 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |
Operating Income |  |  |  |  |  |  |  |  | 72,207 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 67,070 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 62,852 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 3,719 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 5,180 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 3,264 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |
Depreciation and Amortization |  |  |  |  |  |  |  |  | 3,637 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 3,097 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |  | 2,831 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EngineeringAndOtherScientificMember |
Environmental and Health |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 81,320 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 80,196 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 79,349 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |
Operating Income |  |  |  |  |  |  |  |  | 25,145 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 25,072 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 25,752 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 211 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 148 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 289 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |
Depreciation and Amortization |  |  |  |  |  |  |  |  | 197 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 299 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |  | 286 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = expo_EnvironmentalAndHealthMember |
Operating segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | 97,352 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 92,142 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 88,604 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 3,930 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 5,328 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 3,553 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |
Depreciation and Amortization |  |  |  |  |  |  |  |  | 3,834 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 3,396 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |  | 3,117 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_OperatingSegmentsMember |
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | (33,803)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | (36,196)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | (30,984)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 1,017 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 898 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 1,389 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Depreciation and Amortization |  |  |  |  |  |  |  |  | $ 1,570 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | $ 1,555 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | $ 1,594 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
[1] | Geographic revenues are allocated based on the location of the client.

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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