Description of Company and Summary of Significant Accounting Policies - Adjustments for Accounting Standard Updates (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Sep. 26, 2020
Revenue, Initial Application Period Cumulative Effect Transition
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Adoption of new accounting standard		$ (290,583)		$ (328,223)
Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition
Accounts receivable, allowance for credit loss, period increase (decrease)	$ 7,600
Net impact to deferred tax assets		1,900
Cumulative Effect, Period of Adoption, Adjustment | Retained earnings
Revenue, Initial Application Period Cumulative Effect Transition
Adoption of new accounting standard		$ 5,700