Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 7,908	$ 8,585
Basic Earnings Per Common Share (EPS), Shares	17,511,000	17,315,000
Basic EPS, Per Share Amount	$ 0.45	$ 0.50
Dilutive securities, common stock options, Shares	18,000	75,000
Dilutive securities, common stock options, Per Share Amount	$ 0.00	$ (0.01)
Diluted EPS, Shares	17,529,000	17,390,000
Diluted EPS, Per Share Amount	$ 0.45	$ 0.49
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options and RSUs, shares	308,060
RSU Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options and RSUs, shares		202,513