Interim Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Summary of Interim Financial Data

	Three Months Ended
	December 31, 2018		September 30, 2018		June 30, 2018		March 31, 2018		December 31, 2017		September 30, 2017		June 30, 2017		March 31, 2017
	(In thousands, except share and per share data)
Net sales	$	139,971	$	166,380	$	206,692	$	171,207	$	122,212	$	140,194	$	157,941	$	144,806
Gross profit	$	59,856	$	67,210	$	91,115	$	76,713	$	50,906	$	55,284	$	72,014	$	65,169
Net income	$	25,171	$	29,471	$	42,820	$	37,110	$	18,299	$	20,098	$	28,782	$	27,949
Basic net income per share	$	0.43	$	0.50	$	0.73	$	0.63	$	0.31	$	0.34	$	0.49	$	0.48
Basic weighted average common shares outstanding		58,603,537		58,741,973		58,760,753		58,855,156		58,825,696		58,808,098		58,778,916		58,726,420
Diluted net income per share	$	0.43	$	0.50	$	0.73	$	0.63	$	0.31	$	0.34	$	0.49	$	0.48
Diluted weighted average common shares outstanding		58,936,795		59,084,117		59,051,413		59,199,622		59,222,258		59,156,432		59,100,836		59,122,812