Share Buyback Program Narrative (Details) shares in Thousands, $ in Thousands		9 Months Ended
	Oct. 04, 2019 USD ($) shares	Sep. 30, 2019 Program shares	Nov. 26, 2008 shares
Subsequent Event [Line Items]
Common stock available for repurchase (in shares)			1,000
Common stock remaining available for repurchase (in shares)		341
Number of other repurchase programs outstanding | Program		0
Number of stock repurchase programs other expired | Program		0
Subsequent Event
Subsequent Event [Line Items]
Common stock available for repurchase (in shares)	1,000
Share Repurchase Program, Term	1 year
Stock repurchase program | $	$ 5,000