XML 87 R73.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segment Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 28, 2018
Sep. 28, 2018
Jun. 29, 2018
Mar. 30, 2018
Dec. 29, 2017
Sep. 29, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Segment Reporting Information [Line Items]                      
Revenues $ 92,143 $ 95,302 $ 95,621 $ 96,457 $ 88,282 $ 87,555 $ 87,840 $ 84,122 $ 379,523 [1] $ 347,799 [1] $ 315,076 [1]
Operating Income $ 26,786 $ 20,594 $ 22,478 $ 21,598 $ 17,795 $ 19,305 $ 20,317 $ 14,634 91,456 72,051 61,911
Capital Expenditures                 17,381 4,725 14,393
Depreciation and Amortization                 6,292 6,285 6,131
Operating segments                      
Segment Reporting Information [Line Items]                      
Operating Income                 124,131 115,791 99,144
Capital Expenditures                 4,727 3,866 4,433
Depreciation and Amortization                 4,606 4,628 4,610
Engineering and Other Scientific                      
Segment Reporting Information [Line Items]                      
Revenues                 306,265 277,603 248,297
Operating Income                 100,307 93,451 80,494
Capital Expenditures                 4,528 3,648 4,309
Depreciation and Amortization                 4,435 4,449 4,429
Environmental and Health                      
Segment Reporting Information [Line Items]                      
Revenues                 73,258 70,196 66,779
Operating Income                 23,824 22,340 18,650
Capital Expenditures                 199 218 124
Depreciation and Amortization                 171 179 181
Corporate                      
Segment Reporting Information [Line Items]                      
Operating Income                 (32,675) (43,740) (37,233)
Capital Expenditures                 12,654 859 9,960
Depreciation and Amortization                 $ 1,686 $ 1,657 $ 1,521
[1] Geographic revenues are allocated based on the location of the client.