Segments - Schedule of Revenues by Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 536,297	$ 479,457
Gross Profit	154,440	139,911
Total operating expenses	(141,313)	(131,458)
Interest expense	(15,132)	(15,249)
Other income, net	67	13,289
(Loss) income before income taxes	(1,938)	6,493
SBP
Segment Reporting Information [Line Items]
Net sales	463,661	418,463
Gross Profit	134,437	122,426
MI
Segment Reporting Information [Line Items]
Net sales	72,636	60,994
Gross Profit	$ 20,003	$ 17,485