Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Face (par) amount of debt instrument at time of issuance.

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Fair value, after the 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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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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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No definition available.

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Fair value of financial and nonfinancial obligations.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) $ in Thousands, € in Millions	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Apr. 14, 2016 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative Asset, Noncurrent	$ 33,461	$ 24,606
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	79,657	70,590
Fair value liabilities measured on recurring basis	131,188	111,327
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	79,657	70,590
Fair value liabilities measured on recurring basis	128,488	108,691
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value liabilities measured on recurring basis	2,700	2,636
Fair Value, Measurements, Recurring [Member] \| Cash surrender value of life insurance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	46,196	45,984
Fair Value, Measurements, Recurring [Member] \| Cash surrender value of life insurance \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	46,196	45,984
Fair Value, Measurements, Recurring [Member] \| Contingent Consideration Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value liabilities measured on recurring basis	2,700	2,636
Fair Value, Measurements, Recurring [Member] \| Contingent Consideration Liabilities \| Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value liabilities measured on recurring basis	2,700	2,636
Fair Value, Measurements, Recurring [Member] \| Deferred Compensation Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value liabilities measured on recurring basis	50,676	47,199
Fair Value, Measurements, Recurring [Member] \| Deferred Compensation Liabilities \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value liabilities measured on recurring basis	50,676	47,199
Fair Value, Measurements, Recurring [Member] \| Cross Currency Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	9,208
Fair value liabilities measured on recurring basis	77,812	61,492
Fair Value, Measurements, Recurring [Member] \| Cross Currency Swap \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis		5,504
Fair value liabilities measured on recurring basis		61,492
Fair Value, Measurements, Recurring [Member] \| Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis	24,253	19,102
Fair Value, Measurements, Recurring [Member] \| Interest Rate Swap [Member] \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value assets measured on recurring basis		19,102
Euro Notes (2024)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value	652,000	658,000
Debt Instrument, Face Amount	616,200	600,150	€ 500
Cross Currency Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative Asset, Noncurrent	$ 9,208	$ 5,504