Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Stock Repurchases) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 26, 2020	Sep. 28, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Average price per share (in dollars per share)	$ 29.83	$ 36.09
Shares repurchased per cash flow	$ (6,764)	$ (65,106)
Common Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares repurchased (in shares)	214,200	1,797,448
Cash purchase price	$ (6,390)	$ (64,877)
Purchases unsettled as of quarter end	0	125
Prior year purchases settled in current year	(374)	(354)
Shares repurchased per cash flow	$ (6,764)	$ (65,106)

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration