Share-based Compensation (Options) (Details) - Options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 27, 2016	Sep. 29, 2015
Shares
Outstanding at the beginning of the period (in shares)	328,498
Cancelled/Expired (in shares)	(1,694)
Exercised (in shares)	(175,428)
Outstanding at the end of the period (in shares)	151,376
Exercisable at the end of period (in shares)	151,376
Stock options vested (in shares)	0	0
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 13.10
Cancelled/Expired (in dollars per share)	14.60
Exercised (in dollars per share)	12.38
Outstanding at the end of the period (in dollars per share)	13.92
Exercisable at the end of the period (in dollars per share)	$ 13.92
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period	8 months 12 days
Exercisable at the end of the period	8 months 12 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 4,103
Exercisable at the end of the period (in dollars)	4,103
Intrinsic value of options exercised (in dollars)	5,300	$ 5,900
Cash received before tax withholdings from options exercised	2,200	4,200
Excess tax benefit realized from tax deductions associated with options exercised	$ 1,500	$ 1,600