Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Amount, after tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge, attributable to parent. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

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Derivatives and Hedging Activities (Details)		3 Months Ended		6 Months Ended
Derivatives and Hedging Activities (Details)	May 15, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jan. 31, 2019 USD ($) interest_rate_swap	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Gain (loss) recorded in other comprehensive income (loss)		$ (3,284,000)	$ 1,096,000	$ (6,780,000)	$ 2,259,000
Interest Rate Swap
Derivative [Line Items]
Gain (loss) recorded in other comprehensive income (loss)		(2,900,000)		(5,100,000)
Gain (loss) related to change in fair value of net investment hedge		(900,000)		(1,700,000)
Interest Rate Swap \| Other Noncurrent Liabilities
Derivative [Line Items]
Fair value asset of derivative instrument		6,800,000		6,800,000
Designated as Hedging Instrument \| Foreign Exchange Contract
Derivative [Line Items]
Notional foreign exchange contract outstanding	$ 88,000,000.0	81,300,000.0		81,300,000.0
Gain (loss) recorded in other comprehensive income (loss)	2,500,000	(400,000)	1,100,000	(1,700,000)	2,300,000
Gain (loss) related to change in fair value of net investment hedge	$ 800,000	(100,000)	$ 400,000	(600,000)	$ 1,000,000
Designated as Hedging Instrument \| Foreign Exchange Contract \| Other Noncurrent Assets
Derivative [Line Items]
Fair value asset of derivative instrument		$ 1,400,000		$ 1,400,000				$ 4,300,000
London Interbank Offered Rate (LIBOR) \| Interest Rate Swap
Derivative [Line Items]
Number of interest rate swaps \| interest_rate_swap						2
Notional foreign exchange contract outstanding						$ 310,000,000.0
Variable interest rate						2.52%
Other Comprehensive Loss \| Adoption of derivatives guidance
Derivative [Line Items]
Cumulative effect of new accounting principle							$ (172,000)
Other Comprehensive Loss \| Adoption of derivatives guidance \| Designated as Hedging Instrument
Derivative [Line Items]
Cumulative effect of new accounting principle							(200,000)
Retained Earnings \| Adoption of derivatives guidance
Derivative [Line Items]
Cumulative effect of new accounting principle							172,000
Retained Earnings \| Adoption of derivatives guidance \| Designated as Hedging Instrument
Derivative [Line Items]
Cumulative effect of new accounting principle							$ 200,000