Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2016

Unaudited Quarterly Financial Data [Abstract]

Unaudited Quarterly Selected Financial Data

	First		Second		Third		Fourth
Year Ended December 31, 2016	Quarter		Quarter		Quarter		Quarter
Revenues	$	1,085,369	$	1,308,130	$	1,332,978	$	1,246,599
Gross profit		105,092		109,770		124,668		117,660
Income from construction operations		40,122		48,829		60,919		52,050
Income before income taxes		26,724		35,780		47,926		38,685
Net income		15,400		21,361		28,801		30,260
Earnings per share:
Basic	$	0.31	$	0.43	$	0.59	$	0.62
Diluted		0.31		0.43		0.57		0.60

	First		Second		Third		Fourth
Year Ended December 31, 2015	Quarter		Quarter		Quarter		Quarter
Revenues	$	1,066,465	$	1,312,438	$	1,340,739	$	1,200,830
Gross profit		90,759		98,620		100,201		66,673
Income from construction operations		20,084		30,881		38,974		15,474
Income before income taxes		8,205		19,992		33,955		11,687
Net income		5,126		11,777		19,677		8,712
Earnings per share:
Basic	$	0.11	$	0.24	$	0.40	$	0.18
Diluted		0.10		0.24		0.40		0.18