Schedule of Unconsolidated Construction Joint Ventures Assets and Liabilities (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Construction Joint Venture [Line Items]
Affirmative Claim Recovery Estimate		$ 26,700	$ 12,300
Unconsolidated Joint Venture Back charges claims		11,800	5,600
Deficit in unconsolidatedconstruction joint venture		15,900	16,600
Equity in Construction Joint Ventures	[1]	231,887	230,534
Unconsolidated Construction Joint Venture [Member]
Construction Joint Venture [Line Items]
Performance Guarantees		88,600	83,100
Joint Venture Unconsolidated [Member] | Unconsolidated Construction Joint Venture [Member]
Construction Joint Venture [Line Items]
Cash and cash equivalents		289,940	537,991
Other current assets	[2]	812,577	644,809
Noncurrent Assets		219,825	207,240
Current Liabilities		682,832	696,215
Other Partners Interest in Partnerships [Member] | Unconsolidated Construction Joint Venture [Member]
Construction Joint Venture [Line Items]
Interest in assets		869,782	935,615
Interest in liabilities	[3]	462,159	472,324
Reporting Entitys Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture [Member]
Construction Joint Venture [Line Items]
Affirmative Claim Recovery Estimate		74,300	65,400
Interest in assets	[2],[4]	452,560	454,425
Interest in liabilities		$ 220,673	$ 223,891

[1] As of December 31, 2017 and 2016, this balance included $15.9 million and $16.6 million, respectively, of deficit in construction joint ventures that is included in accrued expenses and other current liabilities in the consolidated balance sheets.

[2] Included in this balance and in accrued and other current liabilities on our consolidated balance sheets as of December 31, 2017 and 2016 was $88.6 million and $83.1 million, respectively, related to performance guarantees (see Note 10 of “Notes to the Consolidated Financial Statements”).

[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 primarily related to gross profit forecast differences.

[4] Included in this balance as of December 31, 2017 and 2016 was $74.3 million and $65.4 million, respectively, related to Granite’s share of estimated cost recovery of customer affirmative claims. In addition, the balances as of December 31, 2017 and 2016 included $11.8 million and $5.6 million, respectively, related to Granite’s share of estimated recovery of back charge claims