17. Quarterly Financial Data (Unaudited)

The following table presents the unaudited consolidated operating results by quarter for the years ended December 31, 2017 and 2016:

	For the Three Months Ended
(in thousands, except per share data)	March 31,		June 30,		September 30,		December 31,^(a)
2017:
Revenues	$	300,129	$	356,185	$	373,502	$	373,501
Gross profit		25,740		27,517		34,853		36,894
Net income		1,200		1,230		5,145		13,579
Basic earnings per share	$	0.07	$	0.08	$	0.32	$	0.83
Diluted earnings per share	$	0.07	$	0.07	$	0.31	$	0.82
2016:
Revenues	$	253,634	$	261,934	$	283,259	$	343,660
Gross profit		27,281		31,435		34,063		41,944
Net income		1,987		5,500		6,146		7,798
Basic earnings per share	$	0.10	$	0.32	$	0.39	$	0.49
Diluted earnings per share	$	0.10	$	0.31	$	0.38	$	0.48

(a)

Results for the fourth quarter of 2017 include a net Tax Act benefit of $7.8 million, or $0.48 and $0.47 per basic and diluted share, respectively. See further discussion in Note 10 — Income Taxes to our Financial Statements.

Earnings per share amounts for each quarter are required to be computed independently using the weighted average number of shares outstanding during the period. As a result, the sum of the individual quarterly earnings per share amounts may not agree to the earnings per share calculated for the year.