Earnings Per Share Earnings per share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation [Table Text Block]

The following is a reconciliation of net income (loss) attributable to Granite and related weighted average shares of common stock outstanding for purposes of calculating basic and diluted net income (loss) per share using the two-class method (in thousands, except per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2013		2012		2013			2012
Basic
Numerator:
Net income (loss) attributable to Granite	$	10,997	$	37,121	$	(8,267	)	$	27,297
Less: net income allocated to participating securities	—		181		—			184
Net income (loss) allocated to common shareholders for basic calculation	$	10,997	$	36,940	$	(8,267	)	$	27,113
Denominator:
Weighted average common shares outstanding, basic	38,876		38,518		38,773			38,418
Net income (loss) per share, basic	$	0.28	$	0.96	$	(0.21	)	$	0.71
Diluted
Numerator:
Net income (loss) attributable to Granite	$	10,997	$	37,121	$	(8,267	)	$	27,297
Less: net income allocated to participating securities	—		178		—			181
Net income (loss) allocated to common shareholders for diluted calculation	$	10,997	$	36,943	$	(8,267	)	$	27,116
Denominator:
Weighted average common shares outstanding, diluted	39,759		39,141		38,773			39,013
Net income (loss) per share, diluted	$	0.28	$	0.94	$	(0.21	)	$	0.70