Business combination consideration transferred equity interests issued and issuable vesting period.

No definition available.

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- Definition

Business combination contingent consideration arrangements period.

+ References

No definition available.

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- Definition

Business combination contingent consideration cash share based compensation benefit expense.

+ References

No definition available.

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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- Definition

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.

+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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- Definition

Amount of noncash expense for share-based payment arrangement.

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Acquisitions (Narrative) (Details) $ in Thousands, £ in Millions			1 Months Ended	3 Months Ended		9 Months Ended
	May 01, 2017 USD ($)	Apr. 06, 2017 GBP (£)	Oct. 31, 2017 USD ($)	Sep. 27, 2019 USD ($)	Sep. 28, 2018 USD ($)	Sep. 27, 2019 USD ($)	Sep. 28, 2018 USD ($)
Business Acquisition [Line Items]
Non-cash stock compensation expense						$ 5,733	$ 6,932
Jibe Consulting, Inc [Member]
Business Acquisition [Line Items]
Effective date of acquisition	May 01, 2017
Purchase consideration	$ 5,400
Purchase consideration, common stock	$ 3,600
Common stock vesting period	4 years
Contingent consideration	$ 11,000
Contingent consideration performance period	18 months
Cash compensation (expense) benefit				$ 100	$ (800)	1,100	3,800
Jibe Consulting, Inc [Member] \| Cost of Sales [Member]
Business Acquisition [Line Items]
Non-cash stock compensation expense				34		(200)
Jibe Consulting, Inc [Member] \| Key Employees [Member]
Business Acquisition [Line Items]
Cash compensation (expense) benefit				32	$ (100)	200	$ 100
Jibe Consulting, Inc [Member] \| Cash Contingent Consideration [Member]
Business Acquisition [Line Items]
Contingent consideration	$ 6,600
Jibe Consulting, Inc [Member] \| Stock Based Contingent Consideration [Member]
Business Acquisition [Line Items]
Contingent consideration	$ 4,400
Aecus Limited [Member]
Business Acquisition [Line Items]
Effective date of acquisition		Apr. 06, 2017
Purchase consideration \| £		£ 3.2
Contingent consideration performance period		12 months
Cash compensation (expense) benefit				$ 200		$ 24
Acquired percentage		100.00%
Aecus Limited [Member] \| Cash Contingent Consideration [Member] \| Sellers [Member]
Business Acquisition [Line Items]
Contingent consideration \| £		£ 2.4
Aecus Limited [Member] \| Cash Contingent Consideration [Member] \| Key Personnel [Member]
Business Acquisition [Line Items]
Contingent consideration \| £		0.3
Aecus Limited [Member] \| Stock Based Contingent Consideration [Member] \| Key Personnel [Member]
Business Acquisition [Line Items]
Contingent consideration \| £		£ 0.3
The Chartered Institute of Management Accountants [Member]
Business Acquisition [Line Items]
Purchase consideration			$ 2,000