Note 6 - Unearned Revenue

3 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Unearned Revenue From Unsatisfied Performance Obligations [Text Block]

6.  Unearned Revenue

The following tables present our unearned revenue as of the respective periods (in thousands):

March 31, 2021	Transportation		Water		Specialty		Total
California	$	627,002	$	27,754	$	154,694	$	809,450
Federal		10,028		100		122,256		132,384
Heavy Civil		774,123		6,791		193,933		974,847
Midwest		135,655		—		350,063		485,718
Northwest		518,040		1,423		249,690		769,153
Water and Mineral Services		—		154,185		—		154,185
Total	$	2,064,848	$	190,253	$	1,070,636	$	3,325,737

December 31, 2020	Transportation		Water		Specialty		Total
California	$	618,429	$	38,716	$	141,786	$	798,931
Federal		11,895		227		77,886		90,008
Heavy Civil		913,430		14,605		216,487		1,144,522
Midwest		138,246		—		90,221		228,467
Northwest		487,682		2,462		58,756		548,900
Water and Mineral Services		—		119,124		—		119,124
Total	$	2,169,682	$	175,134	$	585,136	$	2,929,952

March 31, 2020	Transportation		Water		Specialty		Total
California	$	527,971	$	52,136	$	94,006	$	674,113
Federal		18,152		957		131,569		150,678
Heavy Civil		1,321,443		41,511		240,060		1,603,014
Midwest		208,872		150		140,461		349,483
Northwest		614,653		2,868		61,680		679,201
Water and Mineral Services		—		143,539		—		143,539
Total	$	2,691,091	$	241,161	$	667,776	$	3,600,028