Common Stock Repurchase Programs (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended	22 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014	Dec. 28, 2014	Dec. 31, 2014	Oct. 14, 2014	Mar. 31, 2013
Equity, Class of Treasury Stock [Line Items]
Common Shares Purchased and Retired Under Repurchase Program, Total				1,510,759
Stock Repurchased and Retired During Period, Shares	769,931		1,089,560
Payments for Repurchase of Common Stock	$ (14,374)	$ (21,790)	$ (21,800)	$ (30,000)
2013 Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount							$ 30,000
2014 Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 30,000	$ 30,000