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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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The total number of new claims filed pertaining to a loss contingency during the period.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Commitments And Contingencies (Narrative) (Details) $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 28, 2015 USD ($)	Aug. 23, 2013 lawsuit	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) lawsuit	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Commitments And Contingencies [Abstract]
Rent expense under operating leases			$ 4,009	$ 3,542	$ 11,461	$ 9,717
Total liabilities recorded for earnouts			8,317		8,317		$ 10,806
Redeemable noncontrolling interests			$ 8,872		$ 8,872		$ 8,872
Number of stockholder class action lawsuits \| lawsuit		2			9
Provision for arbitration award	$ 11,282
Alleged actual damages	7,254
Fees and expenses	2,318
Prejudgment interest	$ 1,710