Derivatives and Hedging Activities (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 15, 2018	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Net of tax effect on unrealized gain (loss) on derivatives		$ 2,000	$ 1,800
Embedded derivative, fair value liability			0
Other Operating Income (Expense)
Derivative [Line Items]
Change in fair value in amount included as other income (expense)		0	13,200
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Notional foreign exchange contract outstanding		88,000
Gain (loss) recognized		4,400	(3,000)
Net of tax effect on unrealized gain (loss) on derivatives		2,000	(1,800)
Gain recognized in income, ineffective portion		300
Designated as Hedging Instrument | Foreign Exchange Contract | Other Noncurrent Assets
Derivative [Line Items]
Fair value asset of derivative instrument		4,300	2,400
Designated as Hedging Instrument | Foreign Exchange Contract | Other Operating Income (Expense)
Derivative [Line Items]
Gain (loss) recognized			(200)
Senior Notes
Derivative [Line Items]
Long-term debt, gross	$ 575,000	$ 0	$ 575,000
Redemption price, percentage	104.125%
Percentage of option to prepay principal amount	100.00%