Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Variable Interest Entity [Line Items]
Total Unconsolidated JV and Partner's Interest in Revenue As reported			$ 141,785
Total Unconsolidated JV Revenue As reported			288,044
Joint Venture Unconsolidated | Unconsolidated Construction Joint Venture
Variable Interest Entity [Line Items]
Unconsolidated Construction Joint Venture Revenue	[1]	$ 451,321	494,167
Unconsolidated Construction Joint Venture Cost of Revenue		442,990	461,497
Unconsolidated Construction Joint Venture Net Income		8,600	33,700
Parent Company [Member] | Unconsolidated Construction Joint Venture
Variable Interest Entity [Line Items]
Unconsolidated Construction Joint Venture Net Income		1,500	8,500
Other Partners Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture
Variable Interest Entity [Line Items]
Unconsolidated Construction Joint Venture Revenue	[1],[2]	323,830	347,908
Unconsolidated Construction Joint Venture Cost of Revenue	[2]	316,995	324,041
Reporting Entitys Interest in Joint Venture [Member] | Unconsolidated Construction Joint Venture
Variable Interest Entity [Line Items]
Unconsolidated Construction Joint Venture Revenue		127,491	146,259
Unconsolidated Construction Joint Venture Cost of Revenue		125,995	137,456
Unconsolidated Construction Joint Venture Gross Profit Loss		$ 1,496	$ 8,803

[1] While Granite’s interest in revenue, cost of revenue and gross profit were correctly stated, Total revenue and revenue for partners’ interest and adjustments for the three months ended March 31, 2016 were misstated in our Quarterly Report for the quarter ended March 31, 2016. Total revenue and revenue for partner’s interest and adjustments as reported was (in thousands): $288,044 and $141,785, respectively, for the three months ended March 31, 2016. Total revenue and revenue for partner’s interest and adjustments should have been (in thousands): $494,167 and $347,908, respectively, for the three months ended March 31, 2016 and are reflected in the table. The misstatements did not have any impact on the consolidated financial statements in any period. We assessed the materiality of the errors in accordance with the SEC’s Staff Accounting Bulletin 99 and concluded that the errors were not material to either of these previously issued financial statements. Accordingly, we will revise our previously issued financial statements prospectively to correct these errors.

[2] Partners’ interest and adjustments represents 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.