Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 30, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 3,536	$ 2,483
Unrecognized Compensation Cost		$ 5,669
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
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 3,359	2,269
Unrecognized Compensation Cost		$ 5,669
Weighted Average Remaining Amortization Periods		1 year
Number of units [Abstract]
Outstanding (in shares)		904,000
Granted (in shares)		314,000
Vested (in shares)	[1]	(349,000)
Cancelled or forfeited (in shares)		0
Outstanding (in shares)		869,000
Expected to vest (in shares)		855,000
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]	11.50
Cancelled or forfeited (in dollars per share)		0
Outstanding (in dollars per share)		$ 17.92
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized		$ 177	$ 214
Unrecognized Compensation Cost		$ 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)		1,000
Outstanding (in shares)		181,000
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
Expected to vest (in shares)		167,000
Not expected to vest (in shares)		0
Scheduled to Vest January 1, 2021 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		141,000
Expected to vest (in shares)		141,000
Not expected to vest (in shares)		0
Scheduled to Vest January 1, 2022 [Member] | Performance Vested Restricted Stock Units [Member]
Number of units [Abstract]
Outstanding (in shares)		174,000
Expected to vest (in shares)		174,000
Not expected to vest (in shares)		0

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