CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue
Construction	$ 269,220	$ 308,602	$ 426,261	$ 485,720
Large Project Construction	244,328	181,557	431,663	353,271
Construction Materials	72,322	60,185	107,771	89,936
Real Estate	0	4	22	125
Total revenue	585,870	550,348	965,717	929,052
Cost of revenue
Construction	244,393	284,532	392,289	448,451
Large Project Construction	193,536	159,986	365,080	308,979
Construction Materials	65,524	56,231	104,526	91,957
Real Estate	2	3	0	13
Total cost of revenue	503,455	500,752	861,895	849,400
Gross profit	82,415	49,596	103,822	79,652
Selling, general and administrative expenses	51,098	46,789	100,346	103,950
Gain on sales of property and equipment	2,993	3,306	3,886	4,394
Operating income (loss)	34,310	6,113	7,362	(19,904)
Other income (expense)
Interest income	413	380	893	508
Interest expense	(4,339)	(3,700)	(7,937)	(7,345)
Equity in income of affiliates	410	698	1,202	275
Other income (expense), net	1,697	(495)	1,645	608
Total other expense	(1,819)	(3,117)	(4,197)	(5,954)
Income (loss) before provision for (benefit from) income taxes	32,491	2,996	3,165	(25,858)
Provision for (benefit from) income taxes	10,284	1,214	2,220	(7,813)
Net income (loss)	22,207	1,782	945	(18,045)
Amount attributable to non-controlling interests	(8,566)	(363)	(7,858)	(2,518)
Net income (loss) attributable to Granite Construction Incorporated	$ 13,641	$ 1,419	$ (6,913)	$ (20,563)
Net income (loss) per share attributable to common shareholders (see Note 12)
Basic (in dollars per share)	$ 0.35	$ 0.04	$ (0.18)	$ (0.53)
Diluted (in dollars per share)	$ 0.34	$ 0.04	$ (0.18)	$ (0.53)
Weighted average shares of common stock
Weighted average common shares outstanding, basic	39,115	38,829	39,033	38,720
Weighted average common shares outstanding, diluted	39,807	39,769	39,033	38,720
Dividends per common share (in US$ per share)	$ 0.13	$ 0.13	$ 0.26	$ 0.26