Consolidated Statement of Income Statement - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 239,370	$ 224,910	$ 460,660	$ 442,010
Cost of sales	(174,020)	(160,130)	(335,490)	(316,850)
Gross profit	65,350	64,780	125,170	125,160
Selling, general and administrative expenses	(34,240)	(33,260)	(68,210)	(58,430)
Operating profit	31,110	31,520	56,960	66,730
Other expense, net:
Interest expense	(3,490)	(3,480)	(6,930)	(7,180)
Other income (expense), net	1,350	(2,180)	670	(2,740)
Other expense, net	(2,140)	(5,660)	(6,260)	(9,920)
Income before income tax expense	28,970	25,860	50,700	56,810
Income tax expense	(6,950)	(6,260)	(9,590)	(12,890)
Net income	$ 22,020	$ 19,600	$ 41,110	$ 43,920
Basic earnings per share
Net income per share	$ 0.48	$ 0.43	$ 0.90	$ 0.96
Weighted average common shares—basic	45,592,075	45,920,307	45,585,445	45,850,137
Diluted earnings per share
Net income per share	$ 0.48	$ 0.42	$ 0.90	$ 0.95
Weighted average common shares—diluted	45,828,315	46,200,757	45,910,249	46,215,047