Earnings per Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended	6 Months Ended	27 Months Ended
	Jul. 01, 2016	Jul. 01, 2016	Dec. 31, 2015	Oct. 31, 2013
Computation Of Earnings Per Share Line Items
Repurchase of common stock		$ 1,349,000
Common Stock Repurchase Plan
Computation Of Earnings Per Share Line Items
Shares repurchased	91		172
Repurchase of common stock	$ 1,300,000		$ 2,200,000
Shares repurchased, average cost per share	$ 14.88		$ 12.48
Maximum
Computation Of Earnings Per Share Line Items
Outstanding common stock repurchase program authorized amount				$ 10,000,000