Earnings per Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands	9 Months Ended		27 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Dec. 31, 2015	Oct. 31, 2013
Computation Of Earnings Per Share Line Items
Repurchase of common stock	$ 1,634,000	$ 997,000
Common Stock Repurchase Plan
Computation Of Earnings Per Share Line Items
Shares repurchased	109		172
Repurchase of common stock	$ 1,600,000		$ 2,200,000
Shares repurchased, average cost per share	$ 14.93		$ 12.48
Maximum
Computation Of Earnings Per Share Line Items
Outstanding common stock repurchase program authorized amount				$ 10,000,000