Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 890	$ 778	$ 4,426	$ 3,261
Unrecognized Compensation Cost		$ 4,779		$ 4,779
Expiration date of the 2007 stock incentive plan				May 20, 2024
Maximum number of shares granted under restricted stock, unrestricted stock, RSU's and stock options to officers, employees and employee directors (in shares)		6,500,000		6,500,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 890	778	$ 4,249	3,047
Unrecognized Compensation Cost		$ 4,779		$ 4,779
Weighted Average Remaining Amortization Periods				10 months 24 days
Number of units [Abstract]
Outstanding (in shares)				904,000
Granted (in shares)				314,000
Vested (in shares)	[1]			(361,000)
Cancelled or forfeited (in shares)				(15,000)
Outstanding (in shares)		842,000		842,000
Expected to vest (in shares)		842,000		842,000
Weighted Average Grant-date Fair Value per Unit [Abstract]
Outstanding (in dollars per share)				$ 14.77
Granted (in dollars per share)				19.85
Vested (in dollars per share)	[1]			11.70
Cancelled or forfeited (in dollars per share)				17.71
Outstanding (in dollars per share)		$ 17.93		$ 17.93
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 0	$ 0	$ 177	$ 214
Unrecognized Compensation Cost		$ 0		$ 0
Weighted Average Remaining Amortization Periods				0 years
Number of units [Abstract]
Outstanding (in shares)				170,000
Granted (in shares)				10,000
Dividend equivalents issued (in shares)				2,000
Outstanding (in shares)		182,000		182,000
Weighted Average Grant-date Fair Value per Unit [Abstract]
Granted (in dollars per share)				$ 17.72
Scheduled to Vest January 1, 2020 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		167,000		167,000
Expected to vest (in shares)		167,000		167,000
Not expected to vest (in shares)		0		0
Scheduled to Vest January 1, 2021 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		141,000		141,000
Expected to vest (in shares)		141,000		141,000
Not expected to vest (in shares)		0		0
Scheduled to Vest January 1, 2022 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		174,000		174,000
Expected to vest (in shares)		174,000		174,000
Not expected to vest (in shares)		0		0

[1] The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements