Derivatives - Details of Foreign Currency Exchange Contracts Held (Details) - Not designated as hedging instrument	12 Months Ended
	Dec. 31, 2018 USD ($) $ / € ¥ / $ $ / R$	Dec. 31, 2017 USD ($) $ / € ¥ / $ $ / R$
Euro
Derivative [Line Items]
Notional value	$ 20,000,000	$ 17,000,000.0
Forward rate | $ / €	1.1421	1.1858
Unrealized gain (loss) recorded at balance sheet date	$ (97,000)	$ (220,000)
Chinese Yuan
Derivative [Line Items]
Notional value		$ 20,000,000.0
Forward rate | ¥ / $		6.6481
Unrealized gain (loss) recorded at balance sheet date		$ (410,000)
Chinese Yuan | USD/Chinese Yuan Renminbi
Derivative [Line Items]
Notional value	$ 27,000,000
Forward rate | ¥ / $	6.8969
Unrealized gain (loss) recorded at balance sheet date	$ (116,000)
Chinese Yuan | USD/Chinese Yuan
Derivative [Line Items]
Notional value	$ 5,000,000
Forward rate | ¥ / $	6.9245
Unrealized gain (loss) recorded at balance sheet date	$ (41,000)
Brazilian Real
Derivative [Line Items]
Notional value	$ 1,000,000	$ 2,500,000.0
Forward rate | $ / R$	3.8651	3.2350
Unrealized gain (loss) recorded at balance sheet date	$ 5,000	$ 65,000