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Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Stock Repurchases) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares repurchased per cash flow	$ (16,043)	$ (52,850)
Common Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Repurchased common stock (in shares)	368,822	1,300,936
Cash purchase price	$ (14,884)	$ (52,850)
Purchases unsettled as of quarter end	222	0
Prior year purchases settled in current year	(1,381)	0
Shares repurchased per cash flow	$ (16,043)	$ (52,850)

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- Definition

Stock Repurchased During Period, Cash Purchase Price

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Stock Repurchased During Period, Not Settled, Value

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Stock Repurchased During Prior Period, Settled, Value

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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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- Definition

The cash outflow to reacquire common stock during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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