Leases - Supplemental Lease Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 29, 2019 USD ($)	Jun. 29, 2019 USD ($)
Operating lease costs	$ 1,400	$ 2,900
Balance Sheet Information
Operating lease right-of-use assets	18,448	18,448
Operating lease liabilities	$ 19,759	19,759
Cash Flow Information
Cash paid for amounts included in the measurement of operating lease liabilities		3,096
Right-of-use assets obtained in exchange for operating lease obligations		$ 2,488
Operating Lease Information
Weighted-average remaining lease term	4 years 10 months 24 days	4 years 10 months 24 days
Weighted-average discount rate	5.24%	5.24%