Derivatives - Narrative (Details) € in Thousands, ₩ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, kr in Thousands, kr in Thousands, kr in Thousands, SFr in Thousands, R$ in Thousands, R in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) derivative_instrument	Jun. 30, 2019 CNY (¥) derivative_instrument	Jun. 30, 2019 CHF (SFr) derivative_instrument	Jun. 30, 2019 NOK (kr) derivative_instrument	Jun. 30, 2019 DKK (kr) derivative_instrument	Jun. 30, 2019 MXN ($) derivative_instrument	Jun. 30, 2019 HKD ($) derivative_instrument	Jun. 30, 2019 KRW (₩) derivative_instrument	Jun. 30, 2019 CAD ($) derivative_instrument	Jun. 30, 2019 ZAR (R) derivative_instrument	Jun. 30, 2019 GBP (£) derivative_instrument	Jun. 30, 2019 JPY (¥) derivative_instrument	Jun. 30, 2019 SGD ($) derivative_instrument	Jun. 30, 2019 SEK (kr) derivative_instrument	Jun. 30, 2019 EUR (€) derivative_instrument	Jun. 30, 2019 BRL (R$) derivative_instrument	Jun. 30, 2019 AUD ($) derivative_instrument	Dec. 31, 2018 USD ($)	Aug. 05, 2016 USD ($)
Derivative [Line Items]
Deferred taxes used to offset fair value of interest rate swap	$ 500,000																	$ 1,500,000
Maturity of derivative contract (up to)	2 years
Revenue and cost of sales
Derivative [Line Items]
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, gross	$ 6,200
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax	4,600
Interest expense
Derivative [Line Items]
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, gross	1,300,000
Amount expected to be reclassified from accumulated other comprehensive income to earnings in next twelve months, net of tax	$ 1,000,000.0
Interest rate swap
Derivative [Line Items]
Notional amount of derivative																			$ 175,000,000
Fixed rate																			1.12%
Foreign currency forward contracts | Designated as hedging instrument
Derivative [Line Items]
Average number of contracts entered into per month | derivative_instrument	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150	150
Foreign currency forward contracts | Not designated as hedging instrument
Derivative [Line Items]
Notional amount of derivative		¥ 85,226	SFr 643	kr 3,180	kr 2,544	$ 25,000	$ 11,000	₩ 6,000,000	$ 2,652	R 37,800	£ 5,653	¥ 1,445,574	$ 1,676	kr 17,154	€ 11,717	R$ 9,000	$ 13,788
Average number of contracts entered into per month | derivative_instrument	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
Other assets (long-term) | Interest rate swap | Designated as hedging instrument
Derivative [Line Items]
Total Asset Derivatives	$ 1,907,000																	5,772,000
Other assets (long-term) | Foreign currency forward contracts | Designated as hedging instrument
Derivative [Line Items]
Total Asset Derivatives	$ 244,000																	$ 151,000