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.