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Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Revenue | $ 1,062,129 | $ 1,065,189 | $ 2,696,214 | $ 2,616,887
Water and Mineral Services [Member] |  |  |  |
Revenue | 136,275 | 109,428 | 369,357 | 318,398
Transportation [Member] |  |  |  |
Revenue | 568,186 | 623,999 | 1,444,450 | 1,510,001
Transportation [Member] | Water and Mineral Services [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Water [Member] |  |  |  |
Revenue | 121,968 | 106,599 | 335,153 | 317,980
Water [Member] | Water and Mineral Services [Member] |  |  |  |
Revenue | 103,505 | 85,331 | 282,076 | 259,690
Specialty [Member] |  |  |  |
Revenue | 234,300 | 205,134 | 590,245 | 513,087
Specialty [Member] | Water and Mineral Services [Member] |  |  |  |
Revenue | 27,527 | 19,215 | 73,954 | 48,098
Materials [Member] |  |  |  |
Revenue | 137,675 | 129,457 | 326,366 | 275,819
Materials [Member] | Water and Mineral Services [Member] |  |  |  |
Revenue | 5,243 | 4,882 | 13,327 | 10,610
California 1[Member] |  |  |  |
Revenue | 332,070 | 373,658 | 848,307 | 822,288
California 1[Member] | Transportation [Member] |  |  |  |
Revenue | 191,146 | 224,636 | 478,823 | 478,590
California 1[Member] | Water [Member] |  |  |  |
Revenue | 8,531 | 10,498 | 27,512 | 24,225
California 1[Member] | Specialty [Member] |  |  |  |
Revenue | 56,364 | 62,623 | 153,497 | 158,076
California 1[Member] | Materials [Member] |  |  |  |
Revenue | 76,029 | 75,901 | 188,475 | 161,397
Federal [Member] |  |  |  |
Revenue | 33,798 | 32,246 | 80,039 | 85,375
Federal [Member] | Transportation [Member] |  |  |  |
Revenue | 4,442 | 3,140 | 9,593 | 5,306
Federal [Member] | Water [Member] |  |  |  |
Revenue | 9 | 341 | 166 | 1,309
Federal [Member] | Specialty [Member] |  |  |  |
Revenue | 29,347 | 28,765 | 70,280 | 78,760
Federal [Member] | Materials [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Heavy Civil [Member] |  |  |  |
Revenue | 180,424 | 188,311 | 549,660 | 576,186
Heavy Civil [Member] | Transportation [Member] |  |  |  |
Revenue | 138,201 | 165,434 | 445,812 | 519,963
Heavy Civil [Member] | Water [Member] |  |  |  |
Revenue | 7,799 | 9,985 | 21,197 | 28,260
Heavy Civil [Member] | Specialty [Member] |  |  |  |
Revenue | 34,424 | 12,892 | 82,651 | 27,963
Heavy Civil [Member] | Materials [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Midwest [Member] |  |  |  |
Revenue | 60,375 | 68,288 | 155,321 | 177,776
Midwest [Member] | Transportation [Member] |  |  |  |
Revenue | 34,767 | 43,896 | 83,945 | 103,081
Midwest [Member] | Water [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 152
Midwest [Member] | Specialty [Member] |  |  |  |
Revenue | 25,608 | 24,392 | 71,376 | 74,543
Midwest [Member] | Materials [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Northwest [Member] |  |  |  |
Revenue | 319,187 | 293,258 | 693,530 | 636,864
Northwest [Member] | Transportation [Member] |  |  |  |
Revenue | 199,630 | 186,893 | 426,277 | 403,061
Northwest [Member] | Water [Member] |  |  |  |
Revenue | 2,124 | 444 | 4,202 | 4,344
Northwest [Member] | Specialty [Member] |  |  |  |
Revenue | 61,030 | 57,247 | 138,487 | 125,647
Northwest [Member] | Materials [Member] |  |  |  |
Revenue | $ 56,403 | $ 48,674 | $ 124,564 | $ 103,812

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