Details of Certain Balance Sheet Accounts - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Dec. 29, 2018
Property and equipment, net:
Property and equipment, gross	$ 628,711	$ 568,033
Less: Accumulated depreciation	256,642	212,916
Property and equipment, net	372,069	355,117
Land and building
Property and equipment, net:
Property and equipment, gross	3,632	3,632
Equipment
Property and equipment, net:
Property and equipment, gross	186,181	160,958
Information systems hardware and software
Property and equipment, net:
Property and equipment, gross	113,127	101,809
Furniture and fixtures
Property and equipment, net:
Property and equipment, gross	53,922	48,992
Leasehold improvements
Property and equipment, net:
Property and equipment, gross	207,113	186,499
Construction in progress
Property and equipment, net:
Property and equipment, gross	28,299	40,697
Right of use assets under finance leases
Property and equipment, net:
Property and equipment, gross	$ 36,437	$ 25,446

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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