Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Selected Quarterly Financial Information [Abstract]

Schedule of Quarterly Financial Data

	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
2018
Net sales	$	274,512	$	304,085	$	320,946	$	314,446
Gross profit		98,595		107,268		115,214		114,199
Net income attributable to common shareholders		18,526		25,068		30,908		29,519
Earnings per share attributable to common shareholders
Basic	$	0.38	$	0.50	$	0.62	$	0.59
Diluted	$	0.37	$	0.49	$	0.61	$	0.58
	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
2017
Net sales	$	236,303	$	264,224	$	285,247	$	268,430
Gross profit		73,911		90,139		96,347		96,379
Net income (loss) attributable to common shareholders		1,217		13,179		14,450		(30,651	)
Earnings (loss) per share attributable to common shareholders
Basic	$	0.03	$	0.27	$	0.29	$	(0.62	)
Diluted	$	0.02	$	0.26	$	0.29	$	(0.62	)