Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

New Accounting Pronouncement Early Adoption [Line Items]

Summary of Reconciliation of Cash, Cash Equivalents, and Restricted Cash Reported in the Condensed Consolidated Balance Sheets

The table below presents changes in restricted cash and cash equivalents on the condensed consolidated statements of cash flows and a reconciliation to the amounts reported in the condensed consolidated balance sheets (in thousands).

Six Months Ended June 30,	2018			2017
Cash and cash equivalents, beginning of period	$	233,711		$	189,326
End of the period
Cash and cash equivalents		195,515			178,068
Restricted cash		5,746			—
Total cash, cash equivalents and restricted cash, end of period		201,261			178,068
Net decrease in cash, cash equivalents and restricted cash	$	(32,450	)	$	(11,258	)

Accounting Standards Update 2014-09 [Member]

New Accounting Pronouncement Early Adoption [Line Items]

Summary of Impact of Adoption of Accounting Standards

The amounts by which each condensed consolidated balance sheet line item as of June 30, 2018 and condensed consolidated statement of operations line item for the three and six months ended June 30, 2018 was affected by the adoption of Topic 606 relative to the previous revenue guidance are presented in the tables below (in thousands). The changes are primarily related to reclassifications on the condensed consolidated balance sheet and the impact on the condensed consolidated statement of operations from the new requirements under Topic 606. The change in retained earnings is net of the cumulative effect of initially applying Topic 606.

June 30, 2018

Condensed Consolidated Balance Sheet	As Reported		Balances Without Adoption of Topic 606		Effect of Change Higher/(Lower)
Assets
Receivables, net	$	492,718	$	615,782	$	(123,064	)
Contract assets		265,190		—		265,190
Costs and estimated earnings in excess of billings		—		175,265		(175,265	)
Other current assets		49,100		49,813		(713	)
Deferred income taxes, net		25,135		19,863		5,272
Liabilities and equity
Contract liabilities	$	91,864	$	—	$	91,864
Billings in excess of costs and estimated earnings		—		119,335		(119,335	)
Accrued expenses and other current liabilities		293,959		282,222		11,737
Deferred income taxes, net		5,759		5,759		—
Retained earnings		737,417		750,263		(12,846	)

Three Months Ended June 30, 2018

Condensed Consolidated Statement of Operations	As Reported			Balances Without Adoption of Topic 606			Effect of Change Higher/(Lower)
Revenue
Construction	$	432,225		$	433,509		$	(1,284	)
Large Project Construction		273,946			274,228			(282	)
Cost of revenue
Construction	$	370,674		$	370,674		$	—
Large Project Construction		272,608			274,450			(1,842	)
Gross profit		80,369			80,093			276
Operating (loss) income		(5,729	)		(6,005	)		276
Provision for income taxes		2,796			2,746			50
Net (loss) income		(6,081	)		(6,307	)		226
Net (loss) income attributable to Granite Construction Incorporated		(8,385	)		(8,611	)		226

Six Months Ended June 30, 2018

Condensed Consolidated Statement of Operations	As Reported			Balances Without Adoption of Topic 606			Effect of Change Higher/(Lower)
Revenue
Construction	$	701,468		$	702,989		$	(1,521	)
Large Project Construction		522,360			520,849			1,511
Cost of revenue
Construction	$	601,521		$	601,521		$	—
Large Project Construction		500,656			503,734			(3,078	)
Gross profit		136,652			133,584			3,068
Operating (loss) income		(18,564	)		(21,632	)		3,068
(Benefit from) provision for income taxes		(1,335	)		(2,048	)		713
Net (loss) income		(15,743	)		(18,098	)		2,355
Net (loss) income attributable to Granite Construction Incorporated		(19,808	)		(22,163	)		2,355