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Segment Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Cash and cash equivalents	$ 113,407	$ 160,180	$ 137,413	$ 168,514
Administrative and all other
Concentration Risk [Line Items]
Cash and cash equivalents	$ 74,400	$ 113,600	$ 53,400
North America | Geographic | Net Sales
Concentration Risk [Line Items]
Percentage of net sales	10.60%

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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