Business Segments and Geographic Information - Schedule of Sales from External Customers and Long Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales	$ 585,904	$ 574,490	$ 573,366	$ 553,552	$ 530,419	$ 530,356	$ 549,696	$ 502,572	$ 2,287,312	$ 2,113,043	$ 2,020,668
Total long-lived assets — net	258,350				247,816				258,350	247,816	240,945
U.S. Plans
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									1,158,889	1,067,333	1,015,277
Total long-lived assets — net	145,808				152,504				145,808	152,504	144,508
North America, Excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									93,419	84,836	85,852
Total long-lived assets — net	3,627				1,533				3,627	1,533	643
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									567,282	517,179	490,435
Total long-lived assets — net	85,932				71,681				85,932	71,681	69,082
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									366,577	340,624	325,507
Total long-lived assets — net	22,613				21,793				22,613	21,793	26,498
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									101,145	103,071	103,597
Total long-lived assets — net	$ 370				$ 305				$ 370	$ 305	$ 214