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Significant Accounting Policies (Details) $ in Thousands				3 Months Ended	9 Months Ended
	Sep. 25, 2019 USD ($)	Sep. 25, 2019 shares	Sep. 17, 2019 shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2019 USD ($) segment shares
Significant Accounting Policies
Number of Operating Segments | segment					4
Shares sold | shares				3,289,000	3,289,000
Aggregate offering price	$ 69,100			$ 62,804	$ 62,804
Underwriting Discounts	4,700
Offering cost	1,600
Net proceeds	$ 62,800
IPO
Significant Accounting Policies
Shares sold | shares			2,860,000
Underwriter
Significant Accounting Policies
Shares sold | shares		429,000

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