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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Recent Accounting Pronouncements
Income tax benefit	$ 29,811	$ 3,002	$ 677
Retained earnings	851,307	$ 801,999
Accounting Standards Update 2016-09 - Compensation-Stock Compensation \| Scenario, Adjustment
Recent Accounting Pronouncements
Income tax benefit	4,300
Accounting Standards Update 2014-09 - Revenue from Contracts with Customers \| Early Adoption, Effect
Recent Accounting Pronouncements
Retained earnings	26,200
Revenues	49,100
Costs of revenues	$ 19,700