Stockholders' Equity (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended				0 Months Ended						9 Months Ended
	Sep. 29, 2014	Sep. 02, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 29, 2014	Sep. 02, 2014	Oct. 03, 2014 Subsequent Event [Member]	Oct. 03, 2014 Subsequent Event [Member]	Sep. 02, 2014 Minimum [Member]	Sep. 02, 2014 Maximum [Member]	Sep. 30, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Sep. 30, 2014 Additional Paid-in Capital [Member]	Sep. 30, 2014 Retained Earnings [Member]	Sep. 30, 2014 Treasury Stock [Member]	Sep. 30, 2014 Accumulated Other Comprehensive Income (Loss) [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 80,000,000
Stock Repurchase Program, Authorized Per Share Range											$ 26.00	$ 29.00
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance					193,027,000								192,000	192,000	167,908,000	27,711,000	(1,170,000)	(1,614,000)
Net income			7,244,000	6,143,000	19,674,000	16,315,000										19,674,000
Foreign currency translation adjustment					(2,446,000)													(2,446,000)
Repurchases of common stock					(3,051,000)												(3,051,000)
Stock-based compensation expense			491,000	393,000	1,498,000	1,184,000									1,498,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense					1,539,000										1,539,000
Payments Related to Tax Withholding for Share-based Compensation					(1,978,000)	(523,000)									(1,978,000)
Issuance of stock for employer contributions to retirement plan					1,853,000										169,000		1,684,000
Other					236,000										(2,301,000)		2,537,000
Ending Balance			210,352,000		210,352,000								192,000	192,000	166,835,000	47,385,000	0	(4,060,000)
Stock Repurchased During Period, Shares									2,127,706
Treasury Stock Acquired, Average Cost Per Share	$ 29.00
Payments for Repurchase of Equity									61,700,000
Stock Repurchase Program, Percentage of Outstanding Shares Repurchased							11.10%
Common Stock, Shares, Outstanding										17,086,145
Long-term Debt, Gross								$ 40,000,000		$ 40,000,000