Granite Construction (GVA) 10-Q 29 Jul 21 2021 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 22, 2021
Document Information [Line Items]
Entity Central Index Key	0000861459
Entity Registrant Name	GRANITE CONSTRUCTION INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	1-12911
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0239383
Entity Address, Address Line One	585 W. Beach Street
Entity Address, City or Town	Watsonville
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95076
City Area Code	831
Local Phone Number	724-1011
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	GVA
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		45,820,690

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Current assets
Cash and cash equivalents	$ 393,181	$ 436,136	$ 288,922
Receivables, net	646,940	540,812	596,922
Contract assets	194,483	164,939	191,919
Inventories	88,424	82,362	105,023
Equity in construction joint ventures	195,430	188,798	183,542
Other current assets	47,976	42,199	57,614
Total current assets	1,566,434	1,455,246	1,423,942
Property and equipment, net	517,143	527,016	540,053
Long-term marketable securities	10,850	5,200	5,896
Investments in affiliates	75,625	75,287	74,511
Goodwill	116,839	116,777	248,690
Right of use assets	59,219	62,256	72,244
Deferred income taxes, net	41,085	41,839	40,926
Other noncurrent assets	91,703	96,375	102,392
Total assets	2,478,898	2,379,996	2,508,654
Current liabilities
Current maturities of long-term debt	8,709	8,278	8,253
Accounts payable	379,008	359,160	358,401
Contract liabilities	174,850	171,321	159,818
Accrued expenses and other current liabilities	485,718	404,497	363,128
Total current liabilities	1,048,285	943,256	889,600
Long-term debt	331,222	330,522	405,770
Long-term lease liabilities	41,816	46,769	56,071
Deferred income taxes, net	3,166	3,155	3,335
Other long-term liabilities	66,167	64,684	63,118
Commitments and contingencies (see Note 16)
Equity
Preferred stock, $0.01 par value, authorized 3,000,000 shares, none outstanding	0	0	0
Common stock, $0.01 par value, authorized 150,000,000 shares; issued and outstanding: 45,818,719 shares as of June 30, 2021, 45,668,541 shares as of December 31, 2020 and 45,651,914 shares as of June 30, 2020	458	457	458
Additional paid-in capital	556,615	555,407	553,038
Accumulated other comprehensive loss	(2,750)	(5,035)	(5,800)
Retained earnings	401,061	424,835	520,025
Total Granite Construction Incorporated shareholders’ equity	955,384	975,664	1,067,721
Non-controlling interests	32,858	15,946	23,039
Total equity	988,242	991,610	1,090,760
Total liabilities and equity	$ 2,478,898	$ 2,379,996	$ 2,508,654

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Cash and cash equivalents	$ 393,181	$ 436,136	$ 288,922
Receivables, net	646,940	540,812	596,922
Contract assets	194,483	164,939	191,919
Other current assets	47,976	42,199	57,614
Property and equipment, net	517,143	527,016	540,053
Accounts payable	379,008	359,160	358,401
Contract liabilities	174,850	171,321	159,818
Accrued expenses and other current liabilities	$ 485,718	$ 404,497	$ 363,128
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	3,000,000	3,000,000	3,000,000
Preferred stock, outstanding (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000	150,000,000
Common stock, shares issued (in shares)	45,818,719	45,668,541	45,651,914
Common stock, shares outstanding (in shares)	45,818,719	45,668,541	45,651,914
Consolidated Construction Corporate Joint Venture [Member]
Cash and cash equivalents	$ 107,854	$ 74,819	$ 93,500
Receivables, net	49,408	56,147	31,978
Contract assets	41,815	33,838	26,075
Other current assets	12,142	13,252	14,392
Property and equipment, net	20,206	23,704	27,256
Accounts payable	62,117	53,033	56,315
Contract liabilities	66,193	79,777	69,688
Accrued expenses and other current liabilities	$ 5,186	$ 4,410	$ 4,179

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue
Total revenue	$ 964,172	$ 915,771	$ 1,634,085	$ 1,551,698
Cost of revenue
Total cost of revenue	847,226	827,428	1,453,821	1,439,556
Gross profit	116,946	88,343	180,264	112,142
Selling, general and administrative expenses	74,069	78,023	149,797	151,239
Non-cash impairment charges (see Note 3)	0	0	0	24,413
Other costs (see Note 3)	5,953	13,659	81,788	18,824
Gain on sales of property and equipment, net (see Note 12)	(31,636)	(1,190)	(34,190)	(1,813)
Operating income (loss)	68,560	(2,149)	(17,131)	(80,521)
Other (income) expense
Interest income	(188)	(767)	(444)	(2,058)
Interest expense	5,507	6,549	10,888	11,543
Equity in income of affiliates, net	(6,231)	(2,016)	(8,039)	(2,062)
Other (income) expense, net	(1,894)	(3,160)	(3,124)	2,059
Total other (income) expense	(2,806)	606	(719)	9,482
Income (loss) before provision for (benefit from) income taxes	71,366	(2,755)	(16,412)	(90,003)
Provision for (benefit from) income taxes	15,619	(1,782)	(6,836)	(16,492)
Net income (loss)	55,747	(973)	(9,576)	(73,511)
Amount attributable to non-controlling interests	(1,286)	4,378	(2,158)	11,546
Net income (loss) attributable to Granite Construction Incorporated	$ 54,461	$ 3,405	$ (11,734)	$ (61,965)
Net income (loss) per share attributable to common shareholders (see Note 14)
Basic (in dollars per share)	$ 1.19	$ 0.07	$ (0.26)	$ (1.36)
Diluted (in dollars per share)	$ 1.14	$ 0.07	$ (0.26)	$ (1.36)
Weighted average shares of common stock
Basic (in shares)	45,798	45,620	45,748	45,570
Diluted (in shares)	47,798	46,281	45,748	45,570
Transportation [Member]
Revenue
Total revenue	$ 525,235	$ 535,101	$ 876,264	$ 886,002
Cost of revenue
Total cost of revenue	465,718	503,904	780,881	829,436
Water [Member]
Revenue
Total revenue	113,432	109,724	213,185	211,381
Cost of revenue
Total cost of revenue	102,869	97,145	194,056	189,455
Specialty [Member]
Revenue
Total revenue	200,271	174,914	355,945	307,953
Cost of revenue
Total cost of revenue	175,902	149,634	314,251	293,392
Materials [Member]
Revenue
Total revenue	125,234	96,032	188,691	146,362
Cost of revenue
Total cost of revenue	$ 102,737	$ 76,745	$ 164,633	$ 127,273

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (loss)	$ 55,747	$ (973)	$ (9,576)	$ (73,511)
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives	293	265	1,227	(3,095)
Less: reclassification for net losses included in interest expense	568	390	1,178	440
Net change	861	655	2,405	(2,655)
Foreign currency translation adjustments, net	103	83	(122)	(500)
Other comprehensive income (loss)	964	738	2,283	(3,155)
Comprehensive income (loss)	56,711	(235)	(7,293)	(76,666)
Non-controlling interests in comprehensive income	(1,286)	4,378	(2,158)	11,546
Comprehensive income (loss) attributable to Granite Construction Incorporated	$ 55,425	$ 4,143	$ (9,451)	$ (65,120)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Cumulative Effect, Period of Adoption, Adjustment [Member]Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balances (in shares) at Dec. 31, 2019									45,503,805
Balances (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019		$ 0	$ 0	$ 0	$ (366)	$ (366)	$ 0	$ (366)
Balances at Dec. 31, 2019									$ 456	$ 549,307	$ (2,645)	$ 594,353	$ 1,141,471	$ 36,945	$ 1,178,416
Net income (loss)									0	0	0	(61,965)	(61,965)	(11,546)	(73,511)
Other comprehensive income (loss)									$ 0	0	(3,155)	0	(3,155)	0	(3,155)
Purchases of common stock (in shares)	[1]								(53,921)
Dividends on common stock ($0.13 per share)									$ 0	0	0	(11,862)	(11,862)	0	(11,862)
Transactions with non-controlling interests									$ 0	0	0	0	0	(2,360)	(2,360)
Amortized RSUs and other (in shares)									33,670
Amortized RSUs and other									$ 0	4,460	0	(135)	4,325	0	4,325
Purchases of common stock (in shares)	[1]								(53,921)
Purchases of common stock	[1]								$ 0	(727)	0	0	(727)	0	(727)
RSUs vested (in shares)									168,360
RSUs vested									$ 2	(2)	0	0	0	0	0
Purchases of common stock	[1]								$ 0	(727)	0	0	(727)	0	(727)
Balances (in shares) at Jun. 30, 2020									45,651,914
Balances at Jun. 30, 2020									$ 458	553,038	(5,800)	520,025	1,067,721	23,039	1,090,760
Balances (in shares) at Mar. 31, 2020									45,592,292
Balances at Mar. 31, 2020									$ 457	551,189	(6,538)	522,639	1,067,747	32,057	1,099,804
Net income (loss)									0	0	0	3,405	3,405	(4,378)	(973)
Other comprehensive income (loss)									$ 0	0	738	0	738	0	738
Purchases of common stock (in shares)	[1]								(4,211)
Dividends on common stock ($0.13 per share)									$ 0	0	0	(5,935)	(5,935)	0	(5,935)
Transactions with non-controlling interests									$ 0	0	0	0	0	(4,640)	(4,640)
Amortized RSUs and other (in shares)									34,528
Amortized RSUs and other									$ 0	1,923	0	(84)	1,839	0	1,839
Purchases of common stock (in shares)	[1]								(4,211)
Purchases of common stock	[1]								$ 0	(73)	0	0	(73)	0	(73)
RSUs vested (in shares)									29,305
RSUs vested									$ 1	(1)	0	0	0	0	0
Purchases of common stock	[1]								$ 0	(73)	0	0	(73)	0	(73)
Balances (in shares) at Jun. 30, 2020									45,651,914
Balances at Jun. 30, 2020									$ 458	553,038	(5,800)	520,025	1,067,721	23,039	1,090,760
Balances (in shares) at Dec. 31, 2020									45,668,541
Balances at Dec. 31, 2020									$ 457	555,407	(5,035)	424,835	975,664	15,946	991,610
Net income (loss)									0	0	0	(11,734)	(11,734)	2,158	(9,576)
Other comprehensive income (loss)									$ 0	0	2,283	0	2,283	0	2,283
Purchases of common stock (in shares)	[1]								(62,600)
Dividends on common stock ($0.13 per share)									$ 0	0	0	(11,909)	(11,909)	0	(11,909)
Transactions with non-controlling interests									$ 0	0	0	0	0	14,754	14,754
Amortized RSUs and other (in shares)									(789)
Amortized RSUs and other									$ 0	3,707	2	(131)	3,578	0	3,578
Purchases of common stock (in shares)	[1]								(62,600)
Purchases of common stock	[1]								$ (1)	(2,497)	0	0	(2,498)	0	(2,498)
RSUs vested (in shares)									213,567
RSUs vested									$ 2	(2)	0	0	0	0	0
Purchases of common stock	[1]								$ (1)	(2,497)	0	0	(2,498)	0	(2,498)
Balances (in shares) at Jun. 30, 2021									45,818,719
Balances at Jun. 30, 2021									$ 458	556,615	(2,750)	401,061	955,384	32,858	988,242
Balances (in shares) at Mar. 31, 2021									45,791,712
Balances at Mar. 31, 2021									$ 458	554,186	(3,714)	352,610	903,540	27,655	931,195
Net income (loss)									0	0	0	54,461	54,461	1,286	55,747
Other comprehensive income (loss)									$ 0	0	964	0	964	0	964
Purchases of common stock (in shares)	[1]								(4,982)
Purchases of common stock	[1]								$ 0	(199)	0	0	(199)	0	(199)
Restricted stock units (“RSUs”) vested (in shares)									31,992
Restricted stock units (“RSUs”) vested									$ 0	0	0	0	0	0	0
Dividends on common stock ($0.13 per share)									0	0	0	(5,956)	(5,956)	0	(5,956)
Transactions with non-controlling interests									$ 0	0	0	0	0	3,917	3,917
Amortized RSUs and other (in shares)									(3)
Amortized RSUs and other									$ 0	2,628	0	(54)	2,574	0	2,574
Purchases of common stock (in shares)	[1]								(4,982)
Balances (in shares) at Jun. 30, 2021									45,818,719
Balances at Jun. 30, 2021									$ 458	$ 556,615	$ (2,750)	$ 401,061	$ 955,384	$ 32,858	$ 988,242
[1]	On June 2, 2021, the Company's stockholders approved the 2021 Equity Incentive Plan, which replaced the Amended and Restated 2012 Equity Incentive Plan. This amount represents shares purchased in connection with employee tax withholding for RSUs vested under our 2012 and 2021 Equity Incentive Plans.

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Dividends (in dollars per share)	$ 0.13	$ 0.13	$ 0.13	$ 0.13

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net loss	$ (9,576)	$ (73,511)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation, depletion and amortization	52,853	57,269
Amortization related to the 2.75% Convertible Notes (see Note 13)	4,666	4,255
Gain on sales of property and equipment, net (see Note 12)	(34,190)	(1,813)
Stock-based compensation	3,642	3,936
Equity in net (income) loss from unconsolidated joint ventures	(6,972)	30,506
Net income from affiliates	(8,039)	(2,062)
Non-cash impairment charges (see Note 3)	0	24,413
Other non-cash adjustments	1,483	1,832
Changes in assets and liabilities:
Accrual for legal settlement (see Note 16)	129,000	0
Insurance receivable for legal settlement (see Note 16)	(63,000)	0
Receivables	(48,584)	(35,486)
Contract assets, net	(28,111)	83,065
Inventories	(6,062)	(16,138)
Contributions to unconsolidated construction joint ventures	(47,580)	(24,223)
Distributions from unconsolidated construction joint ventures and affiliates	7,029	7,146
Other assets, net	(7,197)	(14,603)
Accounts payable	26,056	(44,103)
Accrued expenses and other liabilities, net	3,578	12,000
Net cash (used in) provided by operating activities	(31,004)	12,483
Investing activities
Purchases of marketable securities	(5,000)	(4,996)
Maturities of marketable securities	0	10,000
Proceeds from called marketable securities	0	20,000
Purchases of property and equipment	(46,437)	(52,236)
Proceeds from sales of property and equipment (see Note 12)	48,517	7,278
Other investing activities, net	4,581	(1,453)
Net cash provided by (used in) investing activities	1,661	(21,407)
Financing activities
Proceeds from debt	0	50,000
Debt principal repayments	(4,677)	(4,212)
Cash dividends paid	(11,890)	(11,842)
Repurchases of common stock	(2,497)	(728)
Contributions from non-controlling partners	11,350	5,500
Distributions to non-controlling partners	(5,836)	(7,860)
Other financing activities, net	(62)	392
Net cash (used in) provided by financing activities	(13,612)	31,250
Net (decrease) increase in cash, cash equivalents and restricted cash	(42,955)	22,326
Cash, cash equivalents and $1,512 and $5,835 in restricted cash at beginning of period	437,648	268,108
Cash, cash equivalents and $1,512 in restricted cash at end of both periods	394,693	290,434
Supplementary Information
Right of use assets obtained in exchange for lease obligations	7,997	8,804
Cash paid for operating lease liabilities	10,956	10,601
Cash paid during the period for:
Interest	8,078	8,874
Income taxes	1,817	937
Non-cash investing and financing activities:
RSUs issued, net of forfeitures	7,554	4,834
Dividends declared but not paid	5,956	5,935
Contributions from non-controlling partners	$ 9,240	$ 0

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Nov. 30, 2019
Restricted cash	$ 1,512	$ 1,512	$ 1,512	$ 5,835
The 2.75% Convertible Notes [Member]
Interest rate	2.75%	2.75%	2.75%		2.75%
Convertible Debt [Member] | The 2.75% Convertible Notes [Member]
Interest rate	2.75%	2.75%	2.75%

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1.   Basis of Presentation The condensed consolidated financial statements included herein have been prepared by Granite Construction Incorporated (“we,” “us,” “our,” the “Company” or “Granite”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), are unaudited and should be read in conjunction with our Annual Report on Form 10 December 31, 2020 June 30, 2021 2020 December 31, 2020 not We prepared the accompanying condensed consolidated financial statements on the same basis as our annual consolidated financial statements. Our policy related to derivative instruments was expanded, as follows, to reflect treatment of the interest rate swap de-designation that occurred during the three June 30, 2021, 9: Derivative Instruments: 2 not not Our operations are typically affected more by weather conditions during the first fourth may three six June 30, 2021 not Cash, Cash Equivalents and Restricted Cash: Six months ended June 30, 2021 2020 Cash, cash equivalents and restricted cash, beginning of period $ 437,648 $ 268,108 End of the period Cash and cash equivalents 393,181 288,922 Restricted cash 1,512 1,512 Total cash, cash equivalents and restricted cash, end of period 394,693 290,434 Net (decrease) increase in cash, cash equivalents and restricted cash $ (42,955 ) $ 22,326

Note 2 - Recently Issued Accoun

Note 2 - Recently Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	2.   Recently Issued Accounting Pronouncements In August 2020, 2020 06, Debt Debt with Conversion and Other Options (Subtopic 470 20 Contracts in Entity s Own Equity (Subtopic 815 40 s Own Equity 2020 06” , March 31, 2022. Upon issuance of the 2.75% convertible senior notes due 2024 “2.75% 2020 06, may In March 2020, 2020 04, Reference Rate Reform (Topic 848 January 2021, 2021 01, Reference Rate Reform (Topic 848 2020 04. March 31, 2020 December 31, 2022, 2022. not

Note 3 - Impairment Charges and

Note 3 - Impairment Charges and Other Costs	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Asset Impairment Charges [Text Block]	3. Goodwill We perform our goodwill impairment tests annually as of November 1 no six June 30, 2021 three June 30, 2020 We performed an interim goodwill impairment test on the March 31, 2020 three March 31, 2020, 19 three March 31, 2020 no 15%. not no Consistent with our annual impairment test, we calculated the estimated fair values of the Water and Mineral Services Group Materials and Water and Mineral Services Group Specialty reporting units using the discounted cash flows and market multiple methods. Judgments inherent in these methods included the determination of appropriate discount rates, the amount and timing of expected future cash flows, revenue and margin growth rates, and appropriate benchmark companies. The cash flows used in our discounted cash flow model were based on five Future developments that we are unable to anticipate may 3 Investments in Affiliates Investments in affiliates are evaluated for impairment using the other-than-temporary impairment model, which requires an impairment charge to be recognized if our investments’ carrying amounts exceed their fair value, and the decline in fair value is deemed to be other than temporary. There were no six June 30, 2021 three June 30, 2020. During the three March 31, 2020, six June 30, 2020 3 Other Costs Other costs included on the condensed consolidated statements of operations primarily consisted of $66.0 million in net settlement charges for the six June 30, 2021 16. three six June 30, 2021, three six June 30, 2020,

Note 4 - Revisions in Estimates

Note 4 - Revisions in Estimates	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Revisions in Estimates [Text Block]	4. Revisions in Estimates Our profit recognition related to construction contracts is based on estimates of transaction price and costs to complete each project. These estimates can vary significantly in the normal course of business as projects progress, circumstances develop and evolve, and uncertainties are resolved. Changes in estimates of transaction price and costs to complete may no no not three six June 30, 2021 2020 not In the normal course of business, we have revisions in estimates, including estimated costs some of which are associated with unresolved affirmative claims and back charges. The estimated or actual recovery related to these estimated costs may may There were no The projects with decreases from revisions in estimates, which individually had an impact of $5.0 Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Number of projects with downward estimate changes — 3 2 5 Amount/range of reduction in gross profit from each project, net $ — $ 5.8 - 16.1 $ 5.3 - 6.1 $ 7.4 - 19.8 Decrease to project profitability — 30.9 11.4 69.8 Increase to net loss — 22.9 8.9 51.8 Increase to net loss per diluted share — 0.50 0.20 1.14 The decreases during the six June 30, 2021 one three six June 30, 2020,

Note 5 - Disaggregation of Reve

Note 5 - Disaggregation of Revenue	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Disaggregation Of Revenue [Text Block]	5.   Disaggregation of Revenue The following tables present our disaggregated revenue (in thousands): Three Months Ended June 30, 2021 Transportation Water Specialty Materials Total California $ 176,307 $ 7,982 $ 51,435 $ 70,490 $ 306,214 Federal 3,297 27 18,847 — 22,171 Heavy Civil 155,868 6,056 26,213 — 188,137 Midwest 32,223 — 25,436 — 57,659 Northwest 157,540 644 51,550 50,756 260,490 Water and Mineral Services — 98,723 26,790 3,988 129,501 Total $ 525,235 $ 113,432 $ 200,271 $ 125,234 $ 964,172 2020 Transportation Water Specialty Materials Total California $ 159,022 $ 8,215 $ 50,965 $ 52,229 $ 270,431 Federal 1,768 587 23,504 — 25,859 Heavy Civil 187,103 11,173 11,577 — 209,853 Midwest 34,942 152 38,648 — 73,742 Northwest 152,266 2,243 36,787 40,685 231,981 Water and Mineral Services — 87,354 13,433 3,118 103,905 Total $ 535,101 $ 109,724 $ 174,914 $ 96,032 $ 915,771 Six Months Ended June 30, 2021 Transportation Water Specialty Materials Total California $ 287,677 $ 18,981 $ 97,133 $ 112,446 $ 516,237 Federal 5,151 157 40,933 — 46,241 Heavy Civil 307,611 13,398 48,227 — 369,236 Midwest 49,178 — 45,768 — 94,946 Northwest 226,647 2,078 77,457 68,161 374,343 Water and Mineral Services — 178,571 46,427 8,084 233,082 Total $ 876,264 $ 213,185 $ 355,945 $ 188,691 $ 1,634,085 2020 Transportation Water Specialty Materials Total California $ 253,954 $ 13,727 $ 95,453 $ 85,496 $ 448,630 Federal 2,166 968 49,995 — 53,129 Heavy Civil 354,529 18,275 15,071 — 387,875 Midwest 59,185 152 50,151 — 109,488 Northwest 216,168 3,900 68,400 55,138 343,606 Water and Mineral Services — 174,359 28,883 5,728 208,970 Total $ 886,002 $ 211,381 $ 307,953 $ 146,362 $ 1,551,698

Note 6 - Unearned Revenue

Note 6 - Unearned Revenue	6 Months Ended
	Jun. 30, 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): June 30, 2021 Transportation Water Specialty Total California $ 769,260 $ 44,066 $ 150,178 $ 963,504 Federal 7,303 73 102,972 110,348 Heavy Civil 622,491 161,632 172,818 956,941 Midwest 107,630 — 295,447 403,077 Northwest 568,814 3,891 292,395 865,100 Water and Mineral Services — 153,051 — 153,051 Total $ 2,075,498 $ 362,713 $ 1,013,810 $ 3,452,021 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 June 30, 2020 Transportation Water Specialty Total California $ 636,385 $ 61,151 $ 122,989 $ 820,525 Federal 16,464 861 123,169 140,494 Heavy Civil 1,188,587 34,961 233,069 1,456,617 Midwest 214,016 — 112,298 326,314 Northwest 571,068 330 89,730 661,128 Water and Mineral Services — 130,561 — 130,561 Total $ 2,626,520 $ 227,864 $ 681,255 $ 3,535,639 Approximately $2.5 billion of the June 30, 2021 twelve

Note 7 - Contract Assets and Li

Note 7 - Contract Assets and Liabilities	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	7.   Contract Assets and Liabilities As work is performed, revenue is recognized and the corresponding contract liabilities are reduced. We recognized revenue of $29.2 million and $175.6 million during the three six June 30, 2021 three six June 30, 2020, December 31, 2020 2019, As a result of changes in contract transaction price from items such as executed or estimated change orders and resolution of contract modifications and claims, we recognized revenue of $44.3 million and $116.4 million during the three six June 30, 2021 three six June 30, 2020 June 30, 2020 As of June 30, 2021 December 31, 2020 June 30, 2020 The components of the contract asset balances as of the respective dates were as follows: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Costs in excess of billings and estimated earnings $ 65,247 $ 39,300 $ 73,745 Contract retention 129,236 125,639 118,174 Total contract assets $ 194,483 $ 164,939 $ 191,919 As of June 30, 2021 December 31, 2020 June 30, 2020 no 15% one The components of the contract liability balances as of the respective dates were as follows: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Billings in excess of costs and estimated earnings, net of retention $ 147,072 $ 143,623 $ 148,050 Provisions for losses 27,778 27,698 11,768 Total contract liabilities $ 174,850 $ 171,321 $ 159,818

Note 8 - Receivables, Net

Note 8 - Receivables, Net	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Financing Receivables [Text Block]	8. Receivables include billed and unbilled amounts for services provided to clients for which we have an unconditional right to payment as of the end of the applicable period and do not (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Contracts completed and in progress: Billed $ 259,319 $ 293,376 $ 311,550 Unbilled 217,025 148,159 163,815 Total contracts completed and in progress 476,344 441,535 475,365 Material sales 66,929 49,991 58,514 Other 105,930 52,736 65,462 Total gross receivables 649,203 544,262 599,341 Less: allowance for credit losses 2,263 3,450 2,419 Total net receivables $ 646,940 $ 540,812 $ 596,922 Included in other receivables at June 30, 2021 December 31, 2020 June 30, 2020 16, no 10%

Note 9 - Fair Value Measurement

Note 9 - Fair Value Measurement	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	9.   Fair Value Measurement The following tables summarize significant assets and liabilities measured at fair value in the condensed consolidated balance sheets on a recurring basis for each of the fair value levels (in thousands): Fair Value Measurement at Reporting Date Using June 30, 2021 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 23,489 $ — $ — $ 23,489 Other current assets Commodity swap — 1,550 — 1,550 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 25,001 $ 1,550 $ — $ 26,551 Accrued and other current liabilities Interest rate swap $ — $ 5,770 $ — $ 5,770 Total liabilities $ — $ 5,770 $ — $ 5,770 December 31, 2020 Cash equivalents Money market funds $ 70,483 $ — $ — $ 70,483 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 71,995 $ — $ — $ 71,995 Accrued and other current liabilities Interest rate swap $ — $ 7,606 $ — $ 7,606 Total liabilities $ — $ 7,606 $ — $ 7,606 June 30, 2020 Cash equivalents Money market funds $ 104,704 $ — $ — $ 104,704 Other current assets Commodity swap — 598 — 598 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 106,216 $ 598 $ — $ 106,814 Accrued and other current liabilities Interest rate swap $ — $ 9,058 $ — $ 9,058 Total liabilities $ — $ 9,058 $ — $ 9,058 Interest Rate Swaps In connection with the Third Amended and Restated Credit Agreement we entered into two May 2018 three March 31, 2021. May 2023. three June 30, 2021, no three June 30, 2021. May 2023 three six June 30, 2021. Commodity Swaps As of June 30, 2021, October 2021. three six June 30, 2021 , Other Assets and Liabilities The carrying values and estimated fair values of financial instruments that are not June 30, 2021 December 31, 2020 June 30, 2020 (in thousands) Fair Value Hierarchy Carrying Value Fair Value Carrying Value Fair Value Carrying Value Fair Value Assets: Held-to-maturity marketable securities (1) Level 1 $ 10,850 $ 10,801 $ 5,200 $ 5,200 $ 5,896 $ 5,896 Liabilities (including current maturities): 2.75% Convertible Notes (2),(3) Level 2 $ 203,771 $ 333,500 $ 200,303 $ 248,400 $ 196,946 $ 184,554 Credit Agreement - term loan (2) Level 3 127,500 128,639 131,250 133,030 135,000 137,116 Credit Agreement - revolving credit facility (2) Level 3 — — — — 75,000 76,291 ( 1 one five ( 2 2.75 13 2.75% ( 3 June 30, 2021 December 31, 2020 June 30, 2020, 2.75% 13 During the three six June 30, 2021 three June 30, 2020, not 3, six June 30, 2020.

Note 10 - Construction Joint Ve

Note 10 - Construction Joint Ventures	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Construction Joint Ventures [Text Block]	10.   Construction Joint Ventures We participate in various construction joint ventures. We have determined that certain of these joint ventures are consolidated because they are variable interest entities (“VIEs”) and we are the primary beneficiary. We continually evaluate whether there are changes in the status of the VIEs or changes to the primary beneficiary designation of the VIE. Based on our assessments during the three six June 30, 2021 no Due to the joint and several nature of the performance obligations under the related owner contracts, if any of the partners fail to perform, we and the remaining partners, if any, would be responsible for performance of the outstanding work (i.e., we provide a performance guarantee). At June 30, 2021 not may Consolidated Construction Joint Ventures (“CCJVs”) At June 30, 2021 nine three six June 30, 2021 three six June 30, 2020 six June 30, 2021 2020 Unconsolidated Construction Joint Ventures As of June 30, 2021 ten June 30, 2021 The following is summary financial information related to unconsolidated construction joint ventures: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Assets Cash, cash equivalents and marketable securities $ 139,381 $ 181,889 $ 213,285 Other current assets (1) 795,440 767,803 948,103 Noncurrent assets 140,160 164,022 185,866 Less partners’ interest 716,678 751,125 908,274 Granite’s interest (1),(2) 358,303 362,589 438,980 Liabilities Current liabilities 432,130 482,562 515,113 Less partners’ interest and adjustments (3) 235,649 226,308 182,035 Granite’s interest 196,481 256,254 333,078 Equity in construction joint ventures (4) $ 161,822 $ 106,335 $ 105,902 ( 1 June 30, 2021 December 31, 2020 June 30, 2020 ( 2 June 30, 2021 December 31, 2020 June 30, 2020 June 30, 2021 December 31, 2020 June 30, 2020 ( 3 ( 4 June 30, 2021 December 31, 2020 June 30, 2020 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Revenue Total $ 263,558 $ 384,461 $ 495,600 $ 446,491 Less partners’ interest and adjustments (1) 176,657 287,639 328,977 265,967 Granite’s interest 86,901 96,822 166,623 180,524 Cost of revenue Total 249,494 356,755 497,564 585,215 Less partners’ interest and adjustments (1) 169,041 241,560 337,775 374,303 Granite’s interest 80,453 115,195 159,789 210,912 Granite’s interest in gross profit (loss) $ 6,448 $ (18,373 ) $ 6,834 $ (30,388 ) ( 1 During the three six June 30, 2021 three six June 30, 2020 five 2021 2020. Line Item Joint Ventures As of June 30, 2021 three June 30, 2021 three six June 30, 2021 three six June 30, 2020

Note 11 - Investments in Affili

Note 11 - Investments in Affiliates	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Investments in and Advances to Affiliates, Schedule of Investments [Text Block]	11.   Investments in Affiliates Our investments in affiliates balance consists of equity method investments in the following types of entities: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Foreign $ 50,308 $ 47,650 $ 45,487 Real estate 11,914 12,777 16,578 Asphalt terminal 13,403 14,860 12,446 Total investments in affiliates $ 75,625 $ 75,287 $ 74,511 The following table provides summarized balance sheet information for our affiliates accounted for under the equity method on a combined basis: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Current assets $ 155,442 $ 133,882 $ 122,608 Noncurrent assets 160,598 164,620 163,790 Total assets 316,040 298,502 286,398 Current liabilities 71,267 52,583 54,044 Long-term liabilities (1) 57,911 66,108 60,714 Total liabilities 129,178 118,691 114,758 Net assets 186,862 179,811 171,640 Granite’s share of net assets $ 75,625 $ 75,287 $ 74,511 ( 1 Of the $316.0 million of total affiliate assets as of June 30, 2021 thirteen two June 30, 2021 six June 30, 2020, 3 June 30, 2021 December 31, 2020 June 30, 2020 June 30, 2021

Note 12 - Property and Equipmen

Note 12 - Property and Equipment, Net	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	12.   Property and Equipment, net Balances of major classes of assets and total accumulated depreciation and depletion are included in property and equipment, net in the condensed consolidated balance sheets and were as follows: (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Equipment and vehicles $ 991,812 $ 950,416 $ 959,083 Quarry property 195,284 206,073 196,033 Land and land improvements 127,417 135,639 135,707 Buildings and leasehold improvements 122,343 124,578 121,387 Office furniture and equipment 76,682 73,512 69,258 Property and equipment 1,513,538 1,490,218 1,481,468 Less: accumulated depreciation and depletion 996,395 963,202 941,415 Property and equipment, net $ 517,143 $ 527,016 $ 540,053 On June 30, 2021, two

Note 13 - Long-term Debt and Cr

Note 13 - Long-term Debt and Credit Arrangements	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Long-term Debt [Text Block]	13.   Long-Term Debt and Credit Arrangements (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 2.75 $ 203,771 $ 200,303 $ 196,946 Credit Agreement - term loan 127,500 131,250 135,000 Credit Agreement - revolving credit facility — — 75,000 Debt issuance costs and other 8,660 7,247 7,077 Total debt 339,931 338,800 414,023 Less current maturities 8,709 8,278 8,253 Total long-term debt $ 331,222 $ 330,522 $ 405,770 As of each June 30, 2021 December 31, 2020 June 30, 2020 May 31, 2018 ( As of June 30, 2021 July 2022 December 2024 As of June 30, 2021, June 30, 2021 As of June 30, 2021 not As of June 30, 2021 December 31, 2020 June 30, 2020 2.75% June 30, 2021 December 31, 2020 June 30, 2020 During the three six June 30, 2021, three six June 30, 2020,

Note 14 - Weighted Average Shar

Note 14 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	14. The following table presents a reconciliation of the weighted average shares outstanding used in calculating basic and diluted net income (loss) per share as well as the calculation of basic and diluted net income (loss) per share: Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share amounts) 2021 2020 2021 2020 Numerator (basic and diluted) Net income (loss) allocated to common shareholders for basic calculation $ 54,461 $ 3,405 $ (11,734 ) $ (61,965 ) Denominator Weighted average common shares outstanding, basic 45,798 45,620 45,748 45,570 Dilutive effect of RSUs (1) 454 661 — — Dilutive effect of 2.75 1,546 — — — Weighted average common shares outstanding, diluted 47,798 46,281 45,748 45,570 Net income (loss) per share, basic $ 1.19 $ 0.07 $ (0.26 ) $ (1.36 ) Net income (loss) per share, diluted $ 1.14 $ 0.07 $ (0.26 ) $ (1.36 ) ( 1 six June 30, 2021 2020, ( 2 $31.47 six June 30, 2021 2.75% three six June 30, 2020 $31.47

Note 15 - Income Taxes

Note 15 - Income Taxes	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	15.  Income Taxes The following table presents the provision for (benefit from) income taxes for the respective periods: Three Months Ended June 30, Six Months Ended June 30, (dollars in thousands) 2021 2020 2021 2020 Provision for (benefit from) income taxes $ 15,619 $ (1,782 ) $ (6,836 ) $ (16,492 ) Effective tax rate 21.9 % 64.7 % 41.7 % 18.3 % Our effective tax rate for the three June 30, 2021 2020 three June 30, 2020. six June 30, 2021 2020. six June 30, 2020 no 3 16 six June 30, 2021

Note 16 - Contingencies - Legal

Note 16 - Contingencies - Legal Proceedings	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Legal Matters and Contingencies [Text Block]	16.  Contingencies - Legal Proceedings In the ordinary course of business, we and our affiliates are involved in various legal proceedings alleging, among other things, liability issues or breach of contract or tortious conduct in connection with the performance of services and/or materials provided, the various outcomes of which cannot be predicted with certainty. We and our affiliates are also subject to government inquiries in the ordinary course of business seeking information concerning our compliance with government construction contracting requirements and various laws and regulations, the outcomes which cannot be predicted with certainty. Some of the matters in which we or our joint ventures and affiliates are involved may not may Accordingly, it is possible that future developments in such proceedings and inquiries could require us to (i) adjust existing accruals, or (ii) record new accruals that we did not not Liabilities relating to legal proceedings and government inquiries, to the extent that we have concluded such liabilities are probable and the amounts of such liabilities are reasonably estimable, are recorded in the consolidated balance sheets. The aggregate liabilities recorded as of June 30, 2021 December 31, 2020 June 30, 2020 On August 13, 2019, February 20, 2020 April 30, 2018 October 24, 2019, 10 20 1934 10b 5 Police Retirement System of St. Louis v. Granite Construction Incorporated, et. al. May 20, 2020, January 21, 2021, On October 23, 2019, Nasseri v. Granite Construction Incorporated, et. al. June 2018 1933 August 10, 2020, September 16, 2020, April 9, 2021, May 14, 2021, July 26, 2021, Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. On April 29, 2021, Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. Nasseri v. Granite Construction Incorporated, et al. Under the Settlement Agreement, the Company will pay or cause to be paid a total of $129 million in cash, $63 million of which it expects to be paid through insurance proceeds. The payment will be paid to a settlement fund that will be used to pay all settlement fees and expenses, attorneys’ fees and expenses, and cash payments to members of the settlement class. The settlement class has agreed to release us, the other defendants named in the lawsuits and certain of their respective related parties from any and all claims, rights, causes of action, liabilities, actions, suits, damages or demands of any kind whatsoever, that relate in any way to the purchase, acquisition, holding, sale or disposition of our common stock during the period between February 17, 2017 October 24, 2019 Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. 1933, 1934, Nasseri v. Granite Construction Incorporated, et al. no On April 30, 2021, Nasseri v. Granite Construction Incorporated, et al. no As a result of entering into the Settlement Agreement, we recorded a pre-tax charge of approximately $66 million in the quarter ended March 31, 2021. On May 6, 2020, 1934 April 30, 2018 October 24, 2019. On May 12, 2021, April 30, 2018 October 24, 2019. We are in the preliminary stages of the litigation and, as a result, we cannot predict the outcome or consequences of these cases, which we intend to defend vigorously. As of June 30, 2021, $66 not not not We were informed on July 20, 2021 2013 2014. March 2014 2015. may 2014, not June 2018, no not no In connection with our disclosure of the Audit/Compliance Committee’s independent investigation of prior-period reporting for the Heavy Civil operating group and the extent to which those matters affected the effectiveness of the Company’s internal control over financial reporting (the “Investigation”), we voluntarily contacted the San Francisco office of the SEC Division of Enforcement regarding the Investigation. The SEC has issued us subpoenas for documents in connection with the accounting issues identified in the Investigation. We have produced documents to the SEC and will continue to cooperate with the SEC in its investigation.

Note 17 - Business Segment Info

Note 17 - Business Segment Information	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	17.   Business Segment Information Summarized segment information is as follows (in thousands): Three Months Ended June 30, Transportation Water Specialty Materials Total 2021 Total revenue from reportable segments $ 525,235 $ 113,432 $ 200,271 $ 176,841 $ 1,015,779 Elimination of intersegment revenue — — — (51,607 ) (51,607 ) Revenue from external customers 525,235 113,432 200,271 125,234 964,172 Gross profit 59,517 10,563 24,369 22,497 116,946 Depreciation, depletion and amortization 5,570 7,323 5,674 6,681 25,248 2020 Total revenue from reportable segments $ 535,101 $ 109,724 $ 174,914 $ 141,858 $ 961,597 Elimination of intersegment revenue — — — (45,826 ) (45,826 ) Revenue from external customers 535,101 109,724 174,914 96,032 915,771 Gross profit 31,197 12,579 25,280 19,287 88,343 Depreciation, depletion and amortization 4,391 9,577 6,737 5,470 26,175 Six Months Ended June 30, Transportation Water Specialty Materials Total 2021 Total revenue from reportable segments $ 876,264 $ 213,185 $ 355,945 $ 255,990 $ 1,701,384 Elimination of intersegment revenue — — — (67,299 ) (67,299 ) Revenue from external customers 876,264 213,185 355,945 188,691 1,634,085 Gross profit 95,383 19,129 41,694 24,058 180,264 Depreciation, depletion and amortization 10,082 14,603 10,251 12,315 47,251 Segment assets 308,918 113,986 104,128 364,413 891,445 2020 Total revenue from reportable segments $ 886,002 $ 211,381 $ 307,953 $ 206,510 $ 1,611,846 Elimination of intersegment revenue — — — (60,148 ) (60,148 ) Revenue from external customers 886,002 211,381 307,953 146,362 1,551,698 Gross profit 56,566 21,926 14,561 19,089 112,142 Depreciation, depletion and amortization 9,417 19,141 13,120 10,443 52,121 Segment assets 304,312 267,385 123,881 377,909 1,073,487 A reconciliation of segment gross profit to consolidated income (loss) before provision for (benefit from) income taxes is as follows: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Total gross profit from reportable segments $ 116,946 $ 88,343 $ 180,264 $ 112,142 Selling, general and administrative expenses 74,069 78,023 149,797 151,239 Non-cash impairment charges (see Note 3) — — — 24,413 Other costs (see Note 3) 5,953 13,659 81,788 18,824 Gain on sales of property and equipment (see Note 12) (31,636 ) (1,190 ) (34,190 ) (1,813 ) Total other (income) expense (2,806 ) 606 (719 ) 9,482 Income (loss) before provision for (benefit from) income taxes $ 71,366 $ (2,755 ) $ (16,412 ) $ (90,003 )

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	Six months ended June 30, 2021 2020 Cash, cash equivalents and restricted cash, beginning of period $ 437,648 $ 268,108 End of the period Cash and cash equivalents 393,181 288,922 Restricted cash 1,512 1,512 Total cash, cash equivalents and restricted cash, end of period 394,693 290,434 Net (decrease) increase in cash, cash equivalents and restricted cash $ (42,955 ) $ 22,326

Note 4 - Revisions in Estimat_2

Note 4 - Revisions in Estimates (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Change in Accounting Estimate [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Number of projects with downward estimate changes — 3 2 5 Amount/range of reduction in gross profit from each project, net $ — $ 5.8 - 16.1 $ 5.3 - 6.1 $ 7.4 - 19.8 Decrease to project profitability — 30.9 11.4 69.8 Increase to net loss — 22.9 8.9 51.8 Increase to net loss per diluted share — 0.50 0.20 1.14

Note 5 - Disaggregation of Re_2

Note 5 - Disaggregation of Revenue (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Disaggregation of Revenue [Table Text Block]	2021 Transportation Water Specialty Materials Total California $ 176,307 $ 7,982 $ 51,435 $ 70,490 $ 306,214 Federal 3,297 27 18,847 — 22,171 Heavy Civil 155,868 6,056 26,213 — 188,137 Midwest 32,223 — 25,436 — 57,659 Northwest 157,540 644 51,550 50,756 260,490 Water and Mineral Services — 98,723 26,790 3,988 129,501 Total $ 525,235 $ 113,432 $ 200,271 $ 125,234 $ 964,172 2020 Transportation Water Specialty Materials Total California $ 159,022 $ 8,215 $ 50,965 $ 52,229 $ 270,431 Federal 1,768 587 23,504 — 25,859 Heavy Civil 187,103 11,173 11,577 — 209,853 Midwest 34,942 152 38,648 — 73,742 Northwest 152,266 2,243 36,787 40,685 231,981 Water and Mineral Services — 87,354 13,433 3,118 103,905 Total $ 535,101 $ 109,724 $ 174,914 $ 96,032 $ 915,771 2021 Transportation Water Specialty Materials Total California $ 287,677 $ 18,981 $ 97,133 $ 112,446 $ 516,237 Federal 5,151 157 40,933 — 46,241 Heavy Civil 307,611 13,398 48,227 — 369,236 Midwest 49,178 — 45,768 — 94,946 Northwest 226,647 2,078 77,457 68,161 374,343 Water and Mineral Services — 178,571 46,427 8,084 233,082 Total $ 876,264 $ 213,185 $ 355,945 $ 188,691 $ 1,634,085 2020 Transportation Water Specialty Materials Total California $ 253,954 $ 13,727 $ 95,453 $ 85,496 $ 448,630 Federal 2,166 968 49,995 — 53,129 Heavy Civil 354,529 18,275 15,071 — 387,875 Midwest 59,185 152 50,151 — 109,488 Northwest 216,168 3,900 68,400 55,138 343,606 Water and Mineral Services — 174,359 28,883 5,728 208,970 Total $ 886,002 $ 211,381 $ 307,953 $ 146,362 $ 1,551,698

Note 6 - Unearned Revenue (Tabl

Note 6 - Unearned Revenue (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule Of Unearned Revenue [Table Text Block]	June 30, 2021 Transportation Water Specialty Total California $ 769,260 $ 44,066 $ 150,178 $ 963,504 Federal 7,303 73 102,972 110,348 Heavy Civil 622,491 161,632 172,818 956,941 Midwest 107,630 — 295,447 403,077 Northwest 568,814 3,891 292,395 865,100 Water and Mineral Services — 153,051 — 153,051 Total $ 2,075,498 $ 362,713 $ 1,013,810 $ 3,452,021 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 June 30, 2020 Transportation Water Specialty Total California $ 636,385 $ 61,151 $ 122,989 $ 820,525 Federal 16,464 861 123,169 140,494 Heavy Civil 1,188,587 34,961 233,069 1,456,617 Midwest 214,016 — 112,298 326,314 Northwest 571,068 330 89,730 661,128 Water and Mineral Services — 130,561 — 130,561 Total $ 2,626,520 $ 227,864 $ 681,255 $ 3,535,639

Note 7 - Contract Assets and _2

Note 7 - Contract Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Costs in excess of billings and estimated earnings $ 65,247 $ 39,300 $ 73,745 Contract retention 129,236 125,639 118,174 Total contract assets $ 194,483 $ 164,939 $ 191,919 (in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Billings in excess of costs and estimated earnings, net of retention $ 147,072 $ 143,623 $ 148,050 Provisions for losses 27,778 27,698 11,768 Total contract liabilities $ 174,850 $ 171,321 $ 159,818

Note 8 - Receivables, Net (Tabl

Note 8 - Receivables, Net (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Contracts completed and in progress: Billed $ 259,319 $ 293,376 $ 311,550 Unbilled 217,025 148,159 163,815 Total contracts completed and in progress 476,344 441,535 475,365 Material sales 66,929 49,991 58,514 Other 105,930 52,736 65,462 Total gross receivables 649,203 544,262 599,341 Less: allowance for credit losses 2,263 3,450 2,419 Total net receivables $ 646,940 $ 540,812 $ 596,922

Note 9 - Fair Value Measureme_2

Note 9 - Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurement at Reporting Date Using June 30, 2021 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 23,489 $ — $ — $ 23,489 Other current assets Commodity swap — 1,550 — 1,550 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 25,001 $ 1,550 $ — $ 26,551 Accrued and other current liabilities Interest rate swap $ — $ 5,770 $ — $ 5,770 Total liabilities $ — $ 5,770 $ — $ 5,770 December 31, 2020 Cash equivalents Money market funds $ 70,483 $ — $ — $ 70,483 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 71,995 $ — $ — $ 71,995 Accrued and other current liabilities Interest rate swap $ — $ 7,606 $ — $ 7,606 Total liabilities $ — $ 7,606 $ — $ 7,606 June 30, 2020 Cash equivalents Money market funds $ 104,704 $ — $ — $ 104,704 Other current assets Commodity swap — 598 — 598 Other noncurrent assets Restricted cash 1,512 — — 1,512 Total assets $ 106,216 $ 598 $ — $ 106,814 Accrued and other current liabilities Interest rate swap $ — $ 9,058 $ — $ 9,058 Total liabilities $ — $ 9,058 $ — $ 9,058
Fair Value, by Balance Sheet Grouping [Table Text Block]	June 30, 2021 December 31, 2020 June 30, 2020 (in thousands) Fair Value Hierarchy Carrying Value Fair Value Carrying Value Fair Value Carrying Value Fair Value Assets: Held-to-maturity marketable securities (1) Level 1 $ 10,850 $ 10,801 $ 5,200 $ 5,200 $ 5,896 $ 5,896 Liabilities (including current maturities): 2.75% Convertible Notes (2),(3) Level 2 $ 203,771 $ 333,500 $ 200,303 $ 248,400 $ 196,946 $ 184,554 Credit Agreement - term loan (2) Level 3 127,500 128,639 131,250 133,030 135,000 137,116 Credit Agreement - revolving credit facility (2) Level 3 — — — — 75,000 76,291

Note 10 - Construction Joint _2

Note 10 - Construction Joint Ventures (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Unconsolidated Joint Ventures Assets and Liabilities [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Assets Cash, cash equivalents and marketable securities $ 139,381 $ 181,889 $ 213,285 Other current assets (1) 795,440 767,803 948,103 Noncurrent assets 140,160 164,022 185,866 Less partners’ interest 716,678 751,125 908,274 Granite’s interest (1),(2) 358,303 362,589 438,980 Liabilities Current liabilities 432,130 482,562 515,113 Less partners’ interest and adjustments (3) 235,649 226,308 182,035 Granite’s interest 196,481 256,254 333,078 Equity in construction joint ventures (4) $ 161,822 $ 106,335 $ 105,902
Schedule of Unconsolidated Joint Ventures Revenue and Costs [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Revenue Total $ 263,558 $ 384,461 $ 495,600 $ 446,491 Less partners’ interest and adjustments (1) 176,657 287,639 328,977 265,967 Granite’s interest 86,901 96,822 166,623 180,524 Cost of revenue Total 249,494 356,755 497,564 585,215 Less partners’ interest and adjustments (1) 169,041 241,560 337,775 374,303 Granite’s interest 80,453 115,195 159,789 210,912 Granite’s interest in gross profit (loss) $ 6,448 $ (18,373 ) $ 6,834 $ (30,388 )

Note 11 - Investments in Affi_2

Note 11 - Investments in Affiliates (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Equity Method Investments [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Foreign $ 50,308 $ 47,650 $ 45,487 Real estate 11,914 12,777 16,578 Asphalt terminal 13,403 14,860 12,446 Total investments in affiliates $ 75,625 $ 75,287 $ 74,511
Equity Method Investment Summarized Balance Financial Information [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Current assets $ 155,442 $ 133,882 $ 122,608 Noncurrent assets 160,598 164,620 163,790 Total assets 316,040 298,502 286,398 Current liabilities 71,267 52,583 54,044 Long-term liabilities (1) 57,911 66,108 60,714 Total liabilities 129,178 118,691 114,758 Net assets 186,862 179,811 171,640 Granite’s share of net assets $ 75,625 $ 75,287 $ 74,511

Note 12 - Property and Equipm_2

Note 12 - Property and Equipment, Net (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 Equipment and vehicles $ 991,812 $ 950,416 $ 959,083 Quarry property 195,284 206,073 196,033 Land and land improvements 127,417 135,639 135,707 Buildings and leasehold improvements 122,343 124,578 121,387 Office furniture and equipment 76,682 73,512 69,258 Property and equipment 1,513,538 1,490,218 1,481,468 Less: accumulated depreciation and depletion 996,395 963,202 941,415 Property and equipment, net $ 517,143 $ 527,016 $ 540,053

Note 13 - Long-term Debt and _2

Note 13 - Long-term Debt and Credit Arrangements (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	(in thousands) June 30, 2021 December 31, 2020 June 30, 2020 2.75 $ 203,771 $ 200,303 $ 196,946 Credit Agreement - term loan 127,500 131,250 135,000 Credit Agreement - revolving credit facility — — 75,000 Debt issuance costs and other 8,660 7,247 7,077 Total debt 339,931 338,800 414,023 Less current maturities 8,709 8,278 8,253 Total long-term debt $ 331,222 $ 330,522 $ 405,770

Note 14 - Weighted Average Sh_2

Note 14 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share amounts) 2021 2020 2021 2020 Numerator (basic and diluted) Net income (loss) allocated to common shareholders for basic calculation $ 54,461 $ 3,405 $ (11,734 ) $ (61,965 ) Denominator Weighted average common shares outstanding, basic 45,798 45,620 45,748 45,570 Dilutive effect of RSUs (1) 454 661 — — Dilutive effect of 2.75 1,546 — — — Weighted average common shares outstanding, diluted 47,798 46,281 45,748 45,570 Net income (loss) per share, basic $ 1.19 $ 0.07 $ (0.26 ) $ (1.36 ) Net income (loss) per share, diluted $ 1.14 $ 0.07 $ (0.26 ) $ (1.36 )

Note 15 - Income Taxes (Tables)

Note 15 - Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (dollars in thousands) 2021 2020 2021 2020 Provision for (benefit from) income taxes $ 15,619 $ (1,782 ) $ (6,836 ) $ (16,492 ) Effective tax rate 21.9 % 64.7 % 41.7 % 18.3 %

Note 17 - Business Segment In_2

Note 17 - Business Segment Information (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Transportation Water Specialty Materials Total 2021 Total revenue from reportable segments $ 525,235 $ 113,432 $ 200,271 $ 176,841 $ 1,015,779 Elimination of intersegment revenue — — — (51,607 ) (51,607 ) Revenue from external customers 525,235 113,432 200,271 125,234 964,172 Gross profit 59,517 10,563 24,369 22,497 116,946 Depreciation, depletion and amortization 5,570 7,323 5,674 6,681 25,248 2020 Total revenue from reportable segments $ 535,101 $ 109,724 $ 174,914 $ 141,858 $ 961,597 Elimination of intersegment revenue — — — (45,826 ) (45,826 ) Revenue from external customers 535,101 109,724 174,914 96,032 915,771 Gross profit 31,197 12,579 25,280 19,287 88,343 Depreciation, depletion and amortization 4,391 9,577 6,737 5,470 26,175 Transportation Water Specialty Materials Total 2021 Total revenue from reportable segments $ 876,264 $ 213,185 $ 355,945 $ 255,990 $ 1,701,384 Elimination of intersegment revenue — — — (67,299 ) (67,299 ) Revenue from external customers 876,264 213,185 355,945 188,691 1,634,085 Gross profit 95,383 19,129 41,694 24,058 180,264 Depreciation, depletion and amortization 10,082 14,603 10,251 12,315 47,251 Segment assets 308,918 113,986 104,128 364,413 891,445 2020 Total revenue from reportable segments $ 886,002 $ 211,381 $ 307,953 $ 206,510 $ 1,611,846 Elimination of intersegment revenue — — — (60,148 ) (60,148 ) Revenue from external customers 886,002 211,381 307,953 146,362 1,551,698 Gross profit 56,566 21,926 14,561 19,089 112,142 Depreciation, depletion and amortization 9,417 19,141 13,120 10,443 52,121 Segment assets 304,312 267,385 123,881 377,909 1,073,487 A reconciliation of segment gross profit to consolidated income (loss) before provision for (benefit from) income taxes is as follows:
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Total gross profit from reportable segments $ 116,946 $ 88,343 $ 180,264 $ 112,142 Selling, general and administrative expenses 74,069 78,023 149,797 151,239 Non-cash impairment charges (see Note 3) — — — 24,413 Other costs (see Note 3) 5,953 13,659 81,788 18,824 Gain on sales of property and equipment (see Note 12) (31,636 ) (1,190 ) (34,190 ) (1,813 ) Total other (income) expense (2,806 ) 606 (719 ) 9,482 Income (loss) before provision for (benefit from) income taxes $ 71,366 $ (2,755 ) $ (16,412 ) $ (90,003 )

Note 1 - Basis of Presentatio_2

Note 1 - Basis of Presentation - Summary of Reconciliation of Cash, Cash Equivalents, and Restricted Cash in the Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash, cash equivalents and $1,512 and $5,835 in restricted cash at beginning of period	$ 437,648	$ 268,108
Cash and cash equivalents	393,181	288,922
Restricted cash	1,512	1,512
Cash, cash equivalents and $1,512 in restricted cash at end of both periods	394,693	290,434
Net (decrease) increase in cash, cash equivalents and restricted cash	$ (42,955)	$ 22,326

Note 2 - Recently Issued Acco_2

Note 2 - Recently Issued Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Jan. 01, 2022	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Nov. 30, 2019
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance		$ 988,242	$ 931,195	$ 991,610	$ 1,090,760	$ 1,099,804	$ 1,178,416
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance		$ 401,061	$ 352,610	$ 424,835	$ 520,025	$ 522,639	$ 594,353
Retained Earnings [Member] | Revision of Prior Period, Adjustment [Member] | Accounting Standards Update 2020-06 [Member] | Forecast [Member] | Minimum [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	$ 20,000
Retained Earnings [Member] | Revision of Prior Period, Adjustment [Member] | Accounting Standards Update 2020-06 [Member] | Forecast [Member] | Maximum [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance	$ 40,000
The 2.75% Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage		2.75%		2.75%	2.75%			2.75%
Long-term Debt, Gross		$ 203,800		$ 200,300	$ 196,900			$ 192,600
Debt Instrument, Convertible, Carrying Amount of Equity Component		$ 26,200		$ 29,700	$ 33,100			27,900
Debt Instrument, Convertible, Carrying Amount of Equity Component, Tax Amount								$ 9,500

Note 3 - Impairment Charges a_2

Note 3 - Impairment Charges and Other Costs (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill, Impairment Loss	$ 0	$ 0		$ 0	$ 24,413
Equity Method Investment, Other than Temporary Impairment					9,600
Nonoperating Income (Expense) [Member]
Litigation Settlement, Expense				66,000
Legal, Accounting and Investigation Fees	$ 6,200	$ 13,500		$ 13,400	$ 18,700
Water and Mineral Services Group Materials [Member]
Goodwill, Impairment Loss			$ 14,800
Water and Minerals Services Group Specialty [Member]
Goodwill, Impairment Loss			$ 0

Note 4 - Revisions in Estimat_3

Note 4 - Revisions in Estimates (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Gross Profit, Total	$ 116,946	$ 88,343	$ 180,264	$ 112,142
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member]
Gross Profit, Total	$ 0		$ 5,000	$ 5,000

Note 4 - Revisions in Estimat_4

Note 4 - Revisions in Estimates - Summary of Impact of Revisions in Estimates to Gross Profit (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)$ / shares	Jun. 30, 2020USD ($)$ / shares	Jun. 30, 2021USD ($)$ / shares	Jun. 30, 2020USD ($)$ / shares
Gross Profit, Total	$ 116,946	$ 88,343	$ 180,264	$ 112,142
Decrease to project profitability	$ (71,366)	$ 2,755	$ 16,412	$ 90,003
Diluted (in dollars per share) | $ / shares	$ 1.14	$ 0.07	$ (0.26)	$ (1.36)
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member]
Number of projects with downward estimate changes	0	3	2	5
Gross Profit, Total	$ 0		$ 5,000	$ 5,000
Decrease to project profitability	0	$ 30,900	11,400	69,800
Increase to net loss	$ 0	$ 22,900	$ 8,900	$ 51,800
Diluted (in dollars per share) | $ / shares	$ 0	$ 0.50	$ 0.20	$ 1.14
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member] | Minimum [Member]
Gross Profit, Total		$ 5,800	$ 5,300	$ 7,400
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member] | Maximum [Member]
Gross Profit, Total		$ 16,100	$ 6,100	$ 19,800

Note 5 - Disaggregation of Re_3

Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 964,172	$ 915,771	$ 1,634,085	$ 1,551,698
Water and Mineral Services [Member]
Revenue	129,501	103,905	233,082	208,970
Transportation [Member]
Revenue	525,235	535,101	876,264	886,002
Transportation [Member] | Water and Mineral Services [Member]
Revenue	0	0	0	0
Water [Member]
Revenue	113,432	109,724	213,185	211,381
Water [Member] | Water and Mineral Services [Member]
Revenue	98,723	87,354	178,571	174,359
Specialty [Member]
Revenue	200,271	174,914	355,945	307,953
Specialty [Member] | Water and Mineral Services [Member]
Revenue	26,790	13,433	46,427	28,883
Materials [Member]
Revenue	125,234	96,032	188,691	146,362
Materials [Member] | Water and Mineral Services [Member]
Revenue	3,988	3,118	8,084	5,728
California 1[Member]
Revenue	306,214	270,431	516,237	448,630
California 1[Member] | Transportation [Member]
Revenue	176,307	159,022	287,677	253,954
California 1[Member] | Water [Member]
Revenue	7,982	8,215	18,981	13,727
California 1[Member] | Specialty [Member]
Revenue	51,435	50,965	97,133	95,453
California 1[Member] | Materials [Member]
Revenue	70,490	52,229	112,446	85,496
Federal [Member]
Revenue	22,171	25,859	46,241	53,129
Federal [Member] | Transportation [Member]
Revenue	3,297	1,768	5,151	2,166
Federal [Member] | Water [Member]
Revenue	27	587	157	968
Federal [Member] | Specialty [Member]
Revenue	18,847	23,504	40,933	49,995
Federal [Member] | Materials [Member]
Revenue	0	0	0	0
Heavy Civil [Member]
Revenue	188,137	209,853	369,236	387,875
Heavy Civil [Member] | Transportation [Member]
Revenue	155,868	187,103	307,611	354,529
Heavy Civil [Member] | Water [Member]
Revenue	6,056	11,173	13,398	18,275
Heavy Civil [Member] | Specialty [Member]
Revenue	26,213	11,577	48,227	15,071
Heavy Civil [Member] | Materials [Member]
Revenue	0	0	0	0
Midwest [Member]
Revenue	57,659	73,742	94,946	109,488
Midwest [Member] | Transportation [Member]
Revenue	32,223	34,942	49,178	59,185
Midwest [Member] | Water [Member]
Revenue	0	152	0	152
Midwest [Member] | Specialty [Member]
Revenue	25,436	38,648	45,768	50,151
Midwest [Member] | Materials [Member]
Revenue	0	0	0	0
Northwest [Member]
Revenue	260,490	231,981	374,343	343,606
Northwest [Member] | Transportation [Member]
Revenue	157,540	152,266	226,647	216,168
Northwest [Member] | Water [Member]
Revenue	644	2,243	2,078	3,900
Northwest [Member] | Specialty [Member]
Revenue	51,550	36,787	77,457	68,400
Northwest [Member] | Materials [Member]
Revenue	$ 50,756	$ 40,685	$ 68,161	$ 55,138

Note 6 - Unearned Revenue (Deta

Note 6 - Unearned Revenue (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020
Revenue, Remaining Performance Obligation, Amount	$ 3,452,021	$ 3,325,737	$ 3,535,639
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Amount	$ 2,500,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)	12 months

Note 6 - Unearned Revenue - Sch

Note 6 - Unearned Revenue - Schedule of Unearned Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020
Unearned Revenue	$ 3,452,021	$ 3,325,737	$ 3,535,639
Water and Mineral Services [Member]
Unearned Revenue	153,051	154,185	130,561
California 1[Member]
Unearned Revenue	963,504	809,450	820,525
Federal [Member]
Unearned Revenue	110,348	132,384	140,494
Heavy Civil [Member]
Unearned Revenue	956,941	974,847	1,456,617
Midwest [Member]
Unearned Revenue	403,077	485,718	326,314
Northwest [Member]
Unearned Revenue	865,100	769,153	661,128
Transportation [Member]
Unearned Revenue	2,075,498	2,064,848	2,626,520
Transportation [Member] | Water and Mineral Services [Member]
Unearned Revenue	0	0	0
Transportation [Member] | California 1[Member]
Unearned Revenue	769,260	627,002	636,385
Transportation [Member] | Federal [Member]
Unearned Revenue	7,303	10,028	16,464
Transportation [Member] | Heavy Civil [Member]
Unearned Revenue	622,491	774,123	1,188,587
Transportation [Member] | Midwest [Member]
Unearned Revenue	107,630	135,655	214,016
Transportation [Member] | Northwest [Member]
Unearned Revenue	568,814	518,040	571,068
Water [Member]
Unearned Revenue	362,713	190,253	227,864
Water [Member] | Water and Mineral Services [Member]
Unearned Revenue	153,051	154,185	130,561
Water [Member] | California 1[Member]
Unearned Revenue	44,066	27,754	61,151
Water [Member] | Federal [Member]
Unearned Revenue	73	100	861
Water [Member] | Heavy Civil [Member]
Unearned Revenue	161,632	6,791	34,961
Water [Member] | Midwest [Member]
Unearned Revenue	0	0	0
Water [Member] | Northwest [Member]
Unearned Revenue	3,891	1,423	330
Specialty [Member]
Unearned Revenue	1,013,810	1,070,636	681,255
Specialty [Member] | Water and Mineral Services [Member]
Unearned Revenue	0	0	0
Specialty [Member] | California 1[Member]
Unearned Revenue	150,178	154,694	122,989
Specialty [Member] | Federal [Member]
Unearned Revenue	102,972	122,256	123,169
Specialty [Member] | Heavy Civil [Member]
Unearned Revenue	172,818	193,933	233,069
Specialty [Member] | Midwest [Member]
Unearned Revenue	295,447	350,063	112,298
Specialty [Member] | Northwest [Member]
Unearned Revenue	$ 292,395	$ 249,690	$ 89,730

Note 7 - Contract Assets and _3

Note 7 - Contract Assets and Liabilities (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Contract With Customer Liability, Revenue Recognized Including Opening Balance	$ 29.2	$ 18.2	$ 175.6	$ 114
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price	44.3	49.9	116.4	93.8
Aggregate Affirmative Claim Recovery Estimate Included in Contract Asset and Liability	$ 47.7	$ 60	$ 47.7	$ 60	$ 37.7

Note 7 - Contract Assets and _4

Note 7 - Contract Assets and Liabilities - Component of Contract Asset and Liability Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Costs in excess of billings and estimated earnings	$ 65,247	$ 39,300	$ 73,745
Contract retention	129,236	125,639	118,174
Total contract assets	194,483	164,939	191,919
Billings in excess of costs and estimated earnings, net of retention	147,072	143,623	148,050
Provisions for losses	27,778	27,698	11,768
Total contract liabilities	$ 174,850	$ 171,321	$ 159,818

Note 8 - Receivables, Net (Deta

Note 8 - Receivables, Net (Details Textual) - USD ($) $ in Millions	Jun. 30, 2021	Apr. 29, 2021
Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. [Member]
Loss Contingency, Receivable, Ending Balance	$ 63	$ 63

Note 8 - Receivables, Net - Sch

Note 8 - Receivables, Net - Schedule of Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Gross receivables	$ 649,203	$ 544,262	$ 599,341
Less: allowance for credit losses	2,263	3,450	2,419
Total net receivables	646,940	540,812	596,922
Completed and in Progress [Member]
Billed	259,319	293,376	311,550
Unbilled	217,025	148,159	163,815
Gross receivables	476,344	441,535	475,365
Material Sales [Member]
Gross receivables	66,929	49,991	58,514
Other Business Products and Services [Member]
Gross receivables	$ 105,930	$ 52,736	$ 65,462

Note 9 - Fair Value Measureme_3

Note 9 - Fair Value Measurement (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Nov. 30, 2019	May 31, 2018
Derivative Liability, Notional Amount						$ 150
Interest Rate Swap De-designated as Cash Flow Hedge, Reduction to Interest Expense	$ 0.8
Interest Rate Swaps, Balance of Swaps Remaining in Other Comprehensive Income, Amount to Be Amortized Quarterly to Interest Expense	5.4	$ 5.4
Interest Rate Swap, Amortization to Interest Expense	$ 0.7	$ 1.5
The 2.75% Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.75%	2.75%	2.75%	2.75%	2.75%
Debt Instrument, Convertible, Carrying Amount of Equity Component	$ 26.2	$ 26.2	$ 29.7	$ 33.1	$ 27.9
US Treasury and Government [Member] | Minimum [Member]
Debt Securities, Held-to-maturity, Term (Year)		1 year
US Treasury and Government [Member] | Maximum [Member]
Debt Securities, Held-to-maturity, Term (Year)		5 years
Commodity Contract [Member]
Derivative, Notional Amount	4.9	$ 4.9
Unrealized Gain (Loss) on Derivatives and Commodity Contracts, Total	$ 1.2	$ 1.3
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.76%

Note 9 - Fair Value Measureme_4

Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Total assets	$ 26,551	$ 71,995	$ 106,814
Interest rate swap	5,770	7,606	9,058
Total liabilities	5,770	7,606	9,058
Fair Value, Inputs, Level 1 [Member]
Total assets	25,001	71,995	106,216
Interest rate swap	0	0	0
Total liabilities	0	0	0
Fair Value, Inputs, Level 2 [Member]
Total assets	1,550	0	598
Interest rate swap	5,770	7,606	9,058
Total liabilities	5,770	7,606	9,058
Fair Value, Inputs, Level 3 [Member]
Total assets	0	0	0
Interest rate swap	0	0	0
Total liabilities	0	0	0
Money Market Funds [Member]
Cash equivalents	23,489	70,483	104,704
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	23,489	70,483	104,704
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0	0
Restricted Cash [Member]
Other noncurrent assets	1,512	1,512	1,512
Restricted Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Other noncurrent assets	1,512	1,512	1,512
Restricted Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Other noncurrent assets	0	0	0
Restricted Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Other noncurrent assets	0	$ 0	0
Derivative Financial Instruments, Assets [Member] | Commodity Contract [Member]
Commodity swap	1,550		598
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Commodity swap	0		0
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Commodity Contract [Member]
Commodity swap	1,550		598
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Commodity Contract [Member]
Commodity swap	$ 0		$ 0

Note 9 - Fair Value Measureme_5

Note 9 - Fair Value Measurement - Schedule of Carrying and Fair Value Amounts (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Held-to-maturity marketable securities (1)	[1]	$ 10,850	$ 5,200	$ 5,896
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
2.75% Convertible Notes	[2],[3]	203,771	200,303	196,946
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member]
Credit Agreement - revolving credit facility	[3]	0	0	75,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Term Loan [Member]
Credit Agreement - term loan	[3]	127,500	131,250	135,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Held-to-maturity marketable securities (1)	[1]	10,801	5,200	5,896
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
2.75% Convertible Notes	[2],[3]	333,500	248,400	184,554
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member]
Credit Agreement - revolving credit facility	[3]	0	0	76,291
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Term Loan [Member]
Credit Agreement - term loan	[3]	$ 128,639	$ 133,030	$ 137,116
[1]	All marketable securities were classified as held-to-maturity and consisted of U.S. Government and agency obligations maturing in one to five years.
[2]	Excluded from the carrying value is debt discount of $26.2 million, $29.7 million and $33.1 million as of June 30, 2021, December 31, 2020 and June 30, 2020, respectively, related to the 2.75% Convertible Notes (see Note 13).
[3]	The fair value of the 2.75% Convertible Notes is based on the median price of the notes in an active market. The fair value of the Credit Agreement is based on borrowing rates available to us for long-term loans with similar terms, average maturities, and credit risk. See Note 13 for more information about the Credit Agreement and 2.75% Convertible Notes.

Note 10 - Construction Joint _3

Note 10 - Construction Joint Ventures (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Contract Value of Active Construction Joint Venture Projects	$ 3,400,000		$ 3,400,000
Contract with Customer, Liability, Total	174,850	$ 159,818	174,850	$ 159,818	$ 171,321
Revenue from Contract with Customer, Including Assessed Tax	964,172	915,771	1,634,085	1,551,698
Retained Earnings (Accumulated Deficit), Ending Balance	401,061	520,025	401,061	520,025	424,835
Net Income (Loss) Attributable to Parent, Total	$ 54,461	3,405	(11,734)	(61,965)
Unconsolidated Construction Joint Venture Net Income (Loss)			$ 6,972	(30,506)
Unconsolidated Construction Corporate Joint Venture [Member]
Number of Active Joint Venture Projects	10		10
Contract Value of Active Construction Joint Venture Projects	$ 11,600,000		$ 11,600,000
Contract with Customer, Liability, Total	297,000		297,000
Affirmative Claim Recovery Estimate	96,700	80,900	96,700	80,900	88,700
Back Charge Claims	14,100	18,000	14,100	18,000	13,100
Retained Earnings (Accumulated Deficit), Ending Balance	33,600	77,600	33,600	77,600	82,500
Net Income (Loss) Attributable to Parent, Total	13,800	27,500	(2,200)	(138,500)
Unconsolidated Construction Joint Venture Net Income (Loss)	6,600	(18,700)	7,000	(30,500)
Unconsolidated Construction Corporate Joint Venture [Member] | Minimum [Member]
Contract Value of Active Construction Joint Venture Projects	13,400		13,400
Contract with Customer, Liability, Total	$ 1,300		$ 1,300
Equity Method Investment, Ownership Percentage	20.00%		20.00%
Unconsolidated Construction Corporate Joint Venture [Member] | Maximum [Member]
Contract Value of Active Construction Joint Venture Projects	$ 3,800,000		$ 3,800,000
Contract with Customer, Liability, Total	$ 61,400		$ 61,400
Equity Method Investment, Ownership Percentage	50.00%		50.00%
Unconsolidated Construction Corporate Joint Venture [Member] | Performance Guarantee [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 400		$ 400
Guarantor Obligations, Current Carrying Value	82,300	82,300	82,300	82,300	$ 82,300
Co-venturer [Member] | Performance Guarantee [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	600		600
Consolidated Construction Corporate Joint Venture [Member]
Contract Value of Active Construction Joint Venture Projects	$ 1,000,000		$ 1,000,000
Consolidated Construction Corporate Joint Venture [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Number of Active Joint Venture Projects	9		9
Contract Value of Active Construction Joint Venture Projects	$ 1,800,000		$ 1,800,000
Contract with Customer, Liability, Total	350,900		350,900
Revenue from Contract with Customer, Including Assessed Tax	114,900	86,000	197,500	140,700
Net Cash Provided by (Used in) Continuing Operations, Total			19,400	19,800
Consolidated Construction Corporate Joint Venture [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Minimum [Member]
Contract Value of Active Construction Joint Venture Projects	2,200		2,200
Contract with Customer, Liability, Total	1,000		$ 1,000
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage			50.00%
Consolidated Construction Corporate Joint Venture [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Maximum [Member]
Contract Value of Active Construction Joint Venture Projects	437,500		$ 437,500
Contract with Customer, Liability, Total	$ 115,800		$ 115,800
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage			70.00%
Line Item Joint Venture [Member]
Number of Active Joint Venture Projects	3		3
Contract Value of Active Construction Joint Venture Projects	$ 172,200		$ 172,200
Line Item Joint Venture [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Contract with Customer, Liability, Total	61,200		61,200
Revenue from Contract with Customer, Including Assessed Tax	$ 20,100	$ 18,400	28,700	$ 31,200
Unconsolidated Construction Joint Venture Net Income (Loss)			280,200
Construction [Member] | Unconsolidated Construction Corporate Joint Venture [Member]
Contract with Customer, Liability, Revenue Recognized			$ 1,000

Note 10 - Construction Joint _4

Note 10 - Construction Joint Ventures - Unconsolidated Construction Joint Ventures Financial Information (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Cash, cash equivalents and marketable securities		$ 139,381	$ 181,889	$ 213,285
Other current assets	[1]	795,440	767,803	948,103
Noncurrent assets		140,160	164,022	185,866
Current liabilities		432,130	482,562	515,113
Equity in construction joint ventures	[2]	161,822	106,335	105,902
Other Partners Interest in Partnerships [Member]
Unconsolidated construction joint venture assets		716,678	751,125	908,274
Unconsolidated construction joint venture liabilities	[3]	235,649	226,308	182,035
Reporting Entitys Interest in Joint Venture [Member]
Unconsolidated construction joint venture assets	[1],[4]	358,303	362,589	438,980
Unconsolidated construction joint venture liabilities		$ 196,481	$ 256,254	$ 333,078
[1]	Included in this balance and in accrued expenses and other current liabilities on the condensed consolidated balance sheets was $82.3 million as of June 30, 2021, December 31, 2020 and June 30, 2020 related to performance guarantees.
[2]	Included in this balance and in accrued expenses and other current liabilities on our condensed consolidated balance sheets was $33.6 million, $82.5 million and $77.6 million as of June 30, 2021, December 31, 2020 and June 30, 2020, respectively, related to deficits in unconsolidated construction joint ventures, which includes provisions for losses.
[3]	Partners' interest and adjustments includes amounts to reconcile total net assets as reported by our partners to Granite's interest adjusted to reflect our accounting policies and estimates primarily related to contract forecast differences.
[4]	Included in this balance as of June 30, 2021, December 31, 2020 and June 30, 2020, was $96.7 million, $88.7 million and $80.9 million, respectively, related to Granite's share of estimated cost recovery of customer affirmative claims. In addition, this balance included $14.1 million, $13.1 million and $18.0 million as of June 30, 2021, December 31, 2020 and June 30, 2020, respectively, related to Granite's share of estimated recovery of back charge claims.

Note 10 - Construction Joint _5

Note 10 - Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cost of revenue		$ 847,226	$ 827,428	$ 1,453,821	$ 1,439,556
Collaborative Arrangement [Member]
Revenue		86,901	96,822	166,623	180,524
Cost of revenue		80,453	115,195	159,789	210,912
Granite’s interest in gross profit (loss)		6,448	(18,373)	6,834	(30,388)
Collaborative Arrangement [Member] | Corporate Joint Venture [Member]
Revenue		263,558	384,461	495,600	446,491
Cost of revenue		249,494	356,755	497,564	585,215
Collaborative Arrangement [Member] | Co-venturer [Member] | Other Partners Interest in Partnerships [Member]
Revenue	[1]	176,657	287,639	328,977	265,967
Cost of revenue	[1]	$ 169,041	$ 241,560	$ 337,775	$ 374,303
[1]	Partners' interest and adjustments includes amounts to reconcile total revenue and total cost of revenue as reported by our partners to Granite's interest adjusted to reflect our accounting policies and estimates primarily related to contract forecast differences.

Note 11 - Investments in Affi_3

Note 11 - Investments in Affiliates (Details Textual) $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Assets, Total	$ 2,508,654	$ 2,478,898	$ 2,379,996
Equity Method Investment, Other than Temporary Impairment	9,600
Foreign Affiliates [Member]
Number of Entities		13
Equity Method Investment, Other than Temporary Impairment	9,600
Foreign Affiliates [Member] | Minimum [Member]
Assets, Total		$ 100
Equity Method Investment, Ownership Percentage		25.00%
Foreign Affiliates [Member] | Maximum [Member]
Assets, Total		$ 82,100
Equity Method Investment, Ownership Percentage		50.00%
Real Estate Entities [Member]
Assets, Total	13,200	$ 66,200
Number of Entities		2
Real Estate Entities [Member] | Minimum [Member]
Equity Method Investment, Ownership Percentage		10.00%
Real Estate Entities [Member] | Maximum [Member]
Equity Method Investment, Ownership Percentage		25.00%
Asphalt Terminal Entity [Member]
Assets, Total		$ 35,300
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Assets, Total	$ 286,398	$ 316,040	$ 298,502

Note 11 - Investments in Affi_4

Note 11 - Investments in Affiliates - Equity Method Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Total investments in affiliates	$ 75,625	$ 75,287	$ 74,511
Foreign Affiliates [Member]
Total investments in affiliates	50,308	47,650	45,487
Real Estate Entities [Member]
Total investments in affiliates	11,914	12,777	16,578
Asphalt Terminal Entity [Member]
Total investments in affiliates	$ 13,403	$ 14,860	$ 12,446

Note 11 - Investments in Affi_5

Note 11 - Investments in Affiliates - Summarized Balance Sheet Information for Equity Method Investments (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Current assets		$ 1,566,434	$ 1,455,246	$ 1,423,942
Total assets		2,478,898	2,379,996	2,508,654
Current liabilities		1,048,285	943,256	889,600
Granite’s share of net assets		75,625	75,287	74,511
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Current assets		155,442	133,882	122,608
Noncurrent assets		160,598	164,620	163,790
Total assets		316,040	298,502	286,398
Current liabilities		71,267	52,583	54,044
Long-term liabilities	[1]	57,911	66,108	60,714
Total liabilities		129,178	118,691	114,758
Net assets		186,862	179,811	171,640
Granite’s share of net assets		$ 75,625	$ 75,287	$ 74,511
[1]	The balance primarily related to local bank debt for equipment purchases and working capital in our foreign affiliates and debt associated with our real estate investments.

Note 12 - Property and Equipm_3

Note 12 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Operating Lease, Right-of-Use Asset	$ 59,219	$ 59,219	$ 72,244	$ 59,219	$ 72,244	$ 62,256
Gain (Loss) on Disposition of Assets, Total		31,636	1,190	34,190	1,813
Operating Lease, Liability, Noncurrent	41,816	41,816	$ 56,071	41,816	$ 56,071	$ 46,769
Sale-leaseback Associated with Two Properties in California [Member]
Sale Leaseback Transaction, Net Book Value, Total	11,100	11,100		11,100
Operating Lease, Right-of-Use Asset	2,400	2,400		2,400
Gain (Loss) on Disposition of Assets, Total	29,700
Operating Lease, Liability, Noncurrent	$ 2,400	$ 2,400		$ 2,400

Note 12 - Property and Equipm_4

Note 12 - Property and Equipment, Net - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Property and equipment, gross	$ 1,513,538	$ 1,490,218	$ 1,481,468
Less: accumulated depreciation and depletion	996,395	963,202	941,415
Property and equipment, net	517,143	527,016	540,053
Equipment and Vehicles [Member]
Property and equipment, gross	991,812	950,416	959,083
Mining Properties and Mineral Rights [Member]
Property and equipment, gross	195,284	206,073	196,033
Land and Land Improvements [Member]
Property and equipment, gross	127,417	135,639	135,707
Building and Building Improvements [Member]
Property and equipment, gross	122,343	124,578	121,387
Furniture and Fixtures [Member]
Property and equipment, gross	$ 76,682	$ 73,512	$ 69,258

Note 13 - Long-term Debt and _3

Note 13 - Long-term Debt and Credit Arrangements (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Nov. 30, 2019
Long-term Debt, Current Maturities, Total	$ 8,709	$ 8,253	$ 8,709	$ 8,253	$ 8,278
Long-term Debt, Excluding Current Maturities, Total	$ 331,222	405,770	$ 331,222	405,770	330,522
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			2.76%
The Credit Agreement [Member]
Consolidated Leverage Ratio, Actual	1.69		1.69
Consolidated Leverage Ratio, Covenant Maximum	3		3
Consolidated Interest Coverage Ratio, Actual	8.26		8.26
Debt Instrument, Covenant, Minimum Consolidated Interest Coverage Ratio	4		4
The Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			1.63%
Debt Instrument, Interest Rate, Effective Percentage	2.38%		2.38%
The Credit Agreement [Member] | Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate			0.63%
Debt Instrument, Interest Rate, Effective Percentage	3.88%		3.88%
The Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Remaining Borrowing Capacity	$ 226,600		$ 226,600
Letters of Credit Outstanding, Amount	48,400		48,400
Long-term Line of Credit, Total	0		0
The Credit Agreement [Member] | Term Loan [Member]
Long-term Debt, Current Maturities, Total	7,500	7,500	7,500	7,500	7,500
Long-term Debt, Excluding Current Maturities, Total	120,000	127,500	120,000	127,500	123,800
The 2.75% Convertible Notes [Member]
Long-term Debt, Gross	203,800	196,900	203,800	196,900	200,300	$ 192,600
Debt Instrument, Unamortized Discount, Total	26,200	33,100	26,200	33,100	$ 29,700
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total	$ 1,800	$ 1,600	$ 3,500	$ 3,200
Debt Instrument, Interest Rate, Stated Percentage	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%
Amortization of Debt Discount (Premium)	$ 600	$ 200	$ 1,200	$ 1,100

Note 13 - Long-term Debt and _4

Note 13 - Long-term Debt and Credit Arrangements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Total debt	$ 339,931	$ 338,800	$ 414,023
Debt issuance costs and other	8,660	7,247	7,077
Long-term Debt, Current Maturities, Total	8,709	8,278	8,253
Long-term Debt, Excluding Current Maturities, Total	331,222	330,522	405,770
Convertible Debt [Member] | The 2.75% Convertible Notes [Member]
Total debt	203,771	200,303	196,946
Term Loan [Member] | The Credit Agreement [Member]
Total debt	127,500	131,250	135,000
Long-term Debt, Current Maturities, Total	7,500	7,500	7,500
Long-term Debt, Excluding Current Maturities, Total	120,000	123,800	127,500
Line of Credit [Member] | The Credit Agreement [Member] | Revolving Credit Facility [Member]
Total debt	$ 0	$ 0	$ 75,000

Note 13 - Long-term Debt and _5

Note 13 - Long-term Debt and Credit Arrangements - Schedule of Long-term Debt (Details) (Parentheticals) - The 2.75% Convertible Notes [Member]	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Nov. 30, 2019
Interest rate	2.75%	2.75%	2.75%	2.75%
Convertible Debt [Member]
Interest rate	2.75%	2.75%	2.75%

Note 14 - Weighted Average Sh_3

Note 14 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Details Textual) - $ / shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Nov. 30, 2019
Share Price, Potential Dilutive Effect (in dollars per share)	$ 31.47
The 2.75% Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.75%	2.75%	2.75%	2.75%
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	503,000	552,000
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1,000,000

Note 14 - Weighted Average Sh_4

Note 14 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share - Reconciliation of the Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (loss) allocated to common shareholders for basic calculation		$ 54,461	$ 3,405	$ (11,734)	$ (61,965)
Weighted average common shares outstanding, basic (in shares)		45,798	45,620	45,748	45,570
Dilutive effect of RSUs (in shares)	[1]	454	661	0	0
Dilutive effect of 2.75% Convertible Notes (in shares)	[2]	1,546	0	0	0
Weighted average common shares outstanding, diluted (in shares)		47,798	46,281	45,748	45,570
Net income (loss) per share, basic (in dollars per share)		$ 1.19	$ 0.07	$ (0.26)	$ (1.36)
Net income (loss) per share, diluted (in dollars per share)		$ 1.14	$ 0.07	$ (0.26)	$ (1.36)
[1]	Due to the net losses for the six months ended June 30, 2021 and 2020, RSUs representing approximately 503,000 and 552,000 shares, respectively, have been excluded from the number of shares used in calculating diluted net loss per share, as their inclusion would be antidilutive.
[2]	Although the average price of our common stock for the period was greater than the initial conversion price of $31.47 per share, due to the net loss for the six months ended June 30, 2021, approximately 1.0 million shares related to the 2.75% Convertible Notes converting into shares of common stock have been excluded from the number of shares used in calculating diluted net loss per share as their inclusion would be antidilutive. The number of shares used in calculating diluted net income (loss) per share for the three and six months ended June 30, 2020 excluded the potential dilution from the 2.75% Convertible Notes converting into shares of common stock as the average price of our common stock was below $31.47 per share for those periods.

Note 14 - Weighted Average Sh_5

Note 14 - Weighted Average Shares Outstanding and Net Income (Loss) Per Share - Reconciliation of the Weighted Average Shares Outstanding (Details) (Parentheticals) - The 2.75% Convertible Notes [Member]	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Nov. 30, 2019
Interest rate	2.75%	2.75%	2.75%	2.75%
Convertible Debt Securities [Member]
Interest rate	2.75%		2.75%

Note 15 - Income Taxes (Details

Note 15 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effective Income Tax Rate Reconciliation, Percent, Total	21.90%	64.70%	41.70%	18.30%
Gain (Loss) Related to Litigation Settlement, Total			$ (66)
Discrete Income Tax Expense (Benefit)			$ 17

Note 15 - Income Taxes - Schedu

Note 15 - Income Taxes - Schedule of (Benefit from) Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Provision for (benefit from) income taxes	$ 15,619	$ (1,782)	$ (6,836)	$ (16,492)
Effective Income Tax Rate Reconciliation, Percent, Total	21.90%	64.70%	41.70%	18.30%

Note 16 - Contingencies - Leg_2

Note 16 - Contingencies - Legal Proceedings (Details Textual) - USD ($) $ in Millions	Apr. 29, 2021	Mar. 31, 2021	Jun. 30, 2021
Loss Contingency Accrual, Ending Balance			$ 66
Gain (Loss) Related to Litigation Settlement, Total			(66)
Police Retirement System of St. Louis v. Granite Construction Incorporated, et al. [Member]
Litigation Settlement, Amount Awarded to Other Party	$ 129
Loss Contingency, Receivable, Ending Balance	$ 63		63
Gain (Loss) Related to Litigation Settlement, Total		$ (66)
Damages Related to Salesforce Tower Office Building in San Francisco [Member] | Potential Legal Action Not Yet Taken Against the Company [Member]
Loss Contingency, Estimate of Possible Loss			$ 100

Note 17 - Business Segment In_3

Note 17 - Business Segment Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Total revenue	$ 964,172	$ 915,771	$ 1,634,085	$ 1,551,698
Gross profit	116,946	88,343	180,264	112,142
Depreciation, depletion and amortization	25,248	26,175	47,251	52,121
Segment assets	2,478,898	2,508,654	2,478,898	2,508,654	$ 2,379,996
Transportation [Member]
Total revenue	525,235	535,101	876,264	886,002
Gross profit	59,517	31,197	95,383	56,566
Depreciation, depletion and amortization	5,570	4,391	10,082	9,417
Water [Member]
Total revenue	113,432	109,724	213,185	211,381
Gross profit	10,563	12,579	19,129	21,926
Depreciation, depletion and amortization	7,323	9,577	14,603	19,141
Specialty [Member]
Total revenue	200,271	174,914	355,945	307,953
Gross profit	24,369	25,280	41,694	14,561
Depreciation, depletion and amortization	5,674	6,737	10,251	13,120
Materials [Member]
Total revenue	125,234	96,032	188,691	146,362
Gross profit	22,497	19,287	24,058	19,089
Depreciation, depletion and amortization	6,681	5,470	12,315	10,443
Operating Segments [Member]
Total revenue	1,015,779	961,597	1,701,384	1,611,846
Gross profit	116,946	88,343	180,264	112,142
Segment assets	891,445	1,073,487	891,445	1,073,487
Operating Segments [Member] | Transportation [Member]
Total revenue	525,235	535,101	876,264	886,002
Segment assets	308,918	304,312	308,918	304,312
Operating Segments [Member] | Water [Member]
Total revenue	113,432	109,724	213,185	211,381
Segment assets	113,986	267,385	113,986	267,385
Operating Segments [Member] | Specialty [Member]
Total revenue	200,271	174,914	355,945	307,953
Segment assets	104,128	123,881	104,128	123,881
Operating Segments [Member] | Materials [Member]
Total revenue	176,841	141,858	255,990	206,510
Segment assets	364,413	377,909	364,413	377,909
Consolidation, Eliminations [Member]
Total revenue	(51,607)	(45,826)	(67,299)	(60,148)
Consolidation, Eliminations [Member] | Transportation [Member]
Total revenue	0	0	0	0
Consolidation, Eliminations [Member] | Water [Member]
Total revenue	0	0	0	0
Consolidation, Eliminations [Member] | Specialty [Member]
Total revenue	0	0	0	0
Consolidation, Eliminations [Member] | Materials [Member]
Total revenue	$ (51,607)	$ (45,826)	$ (67,299)	$ (60,148)

Note 17 - Business Segment In_4

Note 17 - Business Segment Information - Reconciliation of Segment Gross (Loss) Profit to Consolidated Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Gross Profit, Total	$ 116,946	$ 88,343	$ 180,264	$ 112,142
Selling, general and administrative expenses	74,069	78,023	149,797	151,239
Goodwill, Impairment Loss	0	0	0	24,413
Other costs (see Note 3)	5,953	13,659	81,788	18,824
Gain on sales of property and equipment (see Note 12)	(31,636)	(1,190)	(34,190)	(1,813)
Total other (income) expense	(2,806)	606	(719)	9,482
Income (loss) before provision for (benefit from) income taxes	71,366	(2,755)	(16,412)	(90,003)
Operating Segments [Member]
Gross Profit, Total	$ 116,946	$ 88,343	$ 180,264	$ 112,142