Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Assets and Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets, Noncurrent Assets		$ 214,238	$ 204,090	$ 211,963
Equity in Construction Joint Ventures	[1]	183,062	271,162	237,731
Other Partners Interest in Partnerships [Member]
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets		929,332	822,215	792,567
Unconsolidated Construction Joint Venture Liabilities	[2]	243,241	369,782	342,760
Reporting Entitys Interest in Joint Venture [Member]
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets	[3],[4]	470,475	426,416	430,671
Unconsolidated Construction Joint Venture Liabilities		287,413	155,254	192,940
Cash and Cash Equivalents [Member]
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets		225,163	229,562	309,330
Other Assets, Current and Longterm [Member]
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets	[3]	960,406	814,979	701,945
Accounts Payable [Member]
Construction Joint Venture
Unconsolidated Construction Joint Venture Liabilities		$ 530,654	$ 525,036	$ 535,700

[1] Included in this balance and in accrued expenses and other current liabilities on the condensed consolidated balance sheets were amounts related to deficits in construction joint ventures, which includes provisions for losses, that were $58.7 million, $11.5 million and $14.7 million as of June 30, 2019, December 31, 2018 and June 30, 2018, respectively.

[2] 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.

[3] Included in this balance and in accrued expenses and other current liabilities on our condensed consolidated balance sheets was $88.7 million, $88.2 million, $88.6 million related to performance guarantees as of June 30, 2019 and December 31, 2018 and June 30, 2018.

[4] Included in this balance as of June 30, 2019, December 31, 2018 and June 30, 2018 was $89.4 million, $78.1 million and $65.8 million, respectively, related to Granite’s share of estimated cost recovery of customer affirmative claims. In addition, this balance included $12.8 million, $15.6 million and $10.6 million related to Granite’s share of estimated recovery of back charge claims as of June 30, 2019, December 31, 2018 and June 30, 2018, respectively.