Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

The table below summarizes the unaudited quarterly results of operations for the past two years (in thousands, except per share data):

	Quarter
	2019								2018
	First		Second		Third		Fourth		First		Second		Third		Fourth
Net sales	$	597,456	$	1,121,328	$	898,500	$	582,234	$	585,900	$	1,057,804	$	811,311	$	543,082
Gross profit	174,631		330,314		257,931		162,050		166,073		308,655		235,003		160,442
Net income	32,637		131,390		79,525		18,024		31,339		117,049		69,261		16,811
Earnings per share:
Basic	$	0.83	$	3.30	$	1.99	$	0.45	$	0.78	$	2.89	$	1.71	$	0.42
Diluted	$	0.80	$	3.22	$	1.95	$	0.44	$	0.75	$	2.80	$	1.66	$	0.41

The sum of basic and diluted earnings per share for each of the quarters may not equal the total basic and diluted earnings per share for the annual periods because of rounding differences and a difference in the way that in-the-money stock options are considered from quarter to quarter.