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Acquisitions (Narrative) (Details) - Lafayette, California [Member] $ in Thousands		12 Months Ended
	Jan. 03, 2020 USD ($) business	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Number of Businesses Acquired | business	1
Consideration transferred	$ 33,000
Payments to acquire businesses		$ 28,000	$ 5,000
Business combination, purchase price	$ 33,000			$ 33,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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The number of businesses acquired by the entity during the period.

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