Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Assets and Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Construction Joint Venture
Affirmative Claim Recovery Estimate		$ 10,800	$ 12,300	$ 8,100
Unconsolidated Joint Venture Back charges claims		9,800	5,600	4,300
Deficit in unconsolidatedconstruction joint venture		15,900	16,600	8,200
Equity in Construction Joint Ventures	[1]	214,526	230,534	237,298
Unconsolidated Construction Joint Venture
Construction Joint Venture
Performance Guarantees		88,900	83,100	76,800
Joint Venture Unconsolidated | Unconsolidated Construction Joint Venture
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets, Noncurrent Assets		230,633	207,240	216,722
Reporting Entitys Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture
Construction Joint Venture
Affirmative Claim Recovery Estimate		81,700	65,400	57,800
Unconsolidated Construction Joint Venture Assets	[2],[3]	423,104	454,425	437,723
Unconsolidated Construction Joint Venture Liabilities		208,578	223,891	200,425
Other Partners Interest in Partnerships [Member] | Unconsolidated Construction Joint Venture
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets		828,237	935,615	894,017
Unconsolidated Construction Joint Venture Liabilities	[4]	460,052	472,324	434,371
Cash and Cash Equivalents [Member] | Joint Venture Unconsolidated | Unconsolidated Construction Joint Venture
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets		388,542	537,991	435,098
Other Assets, Current and Longterm [Member] | Joint Venture Unconsolidated | Unconsolidated Construction Joint Venture
Construction Joint Venture
Unconsolidated Construction Joint Venture Assets	[2]	632,166	644,809	679,920
Accounts Payable [Member] | Joint Venture Unconsolidated | Unconsolidated Construction Joint Venture
Construction Joint Venture
Unconsolidated Construction Joint Venture Liabilities		$ 668,630	$ 696,215	$ 634,796

[1] As of June 30, 2017, December 31, 2016 and June 30, 2016 this balance included $15.9 million, $16.6 million and $8.2 million, respectively, of deficit in construction joint ventures that is included in accrued expenses and other current liabilities on the condensed consolidated balance sheets

[2] Included in this balance and in accrued and other current liabilities on our condensed consolidated balance sheets as of June 30, 2017, December 31, 2016 and June 30, 2016 was $88.9 million, $83.1 million and $76.8 million, respectively, related to performance guarantees.

[3] Included in this balance as of June 30, 2017, December 31, 2016 and June 30, 2016 was $81.7 million, $65.4 million and $57.8 million, respectively, related to Granite’s share of estimated cost recovery of customer affirmative claims. In addition, this balance included $9.8 million, $5.6 million and $4.3 million related to Granite’s share of estimated recovery of back charge claims as of June 30, 2017, December 31, 2016 and June 30, 2016, respectively.

[4] Partners’ interest and adjustments includes amounts to reconcile total liabilities as reported by our partners to Granite’s interest adjusted to reflect our accounting policies.