Recent Accounting Pronouncements - Narratives (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 01, 2019	Sep. 27, 2019	Sep. 27, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 27,694	$ 27,694
Operating Lease, Liability		35,840	35,840
Impact of Topic 842 on Statement of Cash Flow		2,655	6,937
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 23,300
Operating Lease, Liability	23,300
Cumulative Effect on Retained Earnings, Net of Tax	0
Impact of Topic 842 on Statement of Cash Flow	0
Accounting Standards Update 2018-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,400
Level 3 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total assets measured and recorded at fair value		0	0
Financial Liabilities Fair Value Disclosure		$ 0	$ 0