Unaudited Quarterly Financial Results (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Information

	Quarter Ended									Year Ended Dec. 31,
2015	Mar. 31,		June 30,			Sept. 30,		Dec. 31,
	(in thousands, except per share amounts)
Revenues	$	430,045	$	485,323		$	572,123	$	577,517	$	2,065,008
Gross profit	135,875		158,534			191,404		192,932		678,745
Income from continuing operations	13,023		14,335			24,891		19,173		71,422
Income from discontinued operations, net of income taxes	26,112		(83		)	34		165		26,228
Net income	$	39,135	$	14,252		$	24,925	$	19,338	$	97,650
Basic earnings per common share:
Continuing operations	$	0.25	$	0.28		$	0.47	$	0.36	$	1.37
Discontinued operations	0.51		(0.01		)	—		0.01		0.50
Net income	$	0.76	$	0.27		$	0.47	$	0.37	$	1.87
Diluted earnings per common share:
Continuing operations	$	0.25	$	0.27		$	0.47	$	0.36	$	1.35
Discontinued operations	0.50		—			—		—		0.49
Net income	$	0.75	$	0.27		$	0.47	$	0.36	$	1.84

	Quarter Ended								Year Ended Dec. 31,
2014	Mar. 31,		June 30,		Sept. 30,		Dec. 31,
	(in thousands, except per share amounts)
Revenues	$	406,851	$	434,424	$	442,443	$	441,023	$	1,724,741
Gross profit	128,155		141,905		144,838		142,537		557,435
Income from continuing operations	13,605		19,641		20,723		19,526		73,495
Income from discontinued operations, net of income taxes	312		1,148		1,282		947		3,689
Net income	$	13,917	$	20,789	$	22,005	$	20,473	$	77,184
Basic earnings per common share:
Continuing operations	$	0.25	$	0.36	$	0.39	$	0.38	$	1.38
Discontinued operations	0.01		0.02		0.02		0.01		0.06
Net income	$	0.26	$	0.38	$	0.41	$	0.39	$	1.44
Diluted earnings per common share:
Continuing operations	$	0.25	$	0.36	$	0.38	$	0.37	$	1.35
Discontinued operations	—		0.02		0.03		0.02		0.07
Net income	$	0.25	$	0.38	$	0.41	$	0.39	$	1.42