Employee Retirement Plans - Summary of the Plans' Net Periodic Pension Cost, Benefit Obligations, Funded Status, and Net Balance Sheet Position (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2010
Elgin Plan [Member]
Net Periodic Pension Cost:
Service cost	$ 0	$ 0
Interest cost	175	198
Expected return on assets	(209)	(171)
Amortization of net loss (gain)	154	218
Amortization of net loss (gain)	0	0
Net periodic benefit cost	120	245
Change in Benefit Obligation:
Benefit obligation – beginning of year	4,862		4,801
Service cost	0	0
Interest cost	175	198
Actuarial (gain)	(675)	125
Pension settlement	0	0
Net benefit payments	(228)	(262)
Benefit obligation – end of year	4,134	4,862	4,801
Change in Plan Assets:
Plan assets at fair value – beginning of year	3,503		3,188
Company contributions	128	255
Investment gain	319	322
Benefit payments and plan expenses	(228)	(262)
Plan assets at fair value – end of year	3,722	3,503	3,188
Funded Status:
Unfunded benefit obligation	(412)	(1,359)
Amounts recognized in balance sheet at year end:
Other noncurrent liabilities	(412)	(1,359)
Pre-tax components in accumulated other comprehensive income:
Net actuarial loss (gain)	918	1,857
Net prior service cost	0	0
Net transaction (asset) obligations	0	0
Total amount recognized	918	1,857
Accumulated Benefit Obligation	4,134	4,862
Assumed discount rate	4.70%	4.00%
Expected return on assets	6.00%	5.50%
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	0	0
Smithville Plan [Member]
Net Periodic Pension Cost:
Service cost	0	0
Interest cost	643	642
Expected return on assets	(529)	(546)
Amortization of net loss (gain)	519	537
Amortization of net loss (gain)	0	0
Net periodic benefit cost	633	633
Change in Benefit Obligation:
Benefit obligation – beginning of year	16,070		15,204
Service cost	0	0
Interest cost	643	642
Actuarial (gain)	(1,282)	724
Pension settlement	0	0
Net benefit payments	(632)	(500)
Benefit obligation – end of year	14,799	16,070	15,204
Change in Plan Assets:
Plan assets at fair value – beginning of year	8,781		7,820
Company contributions	649	638
Investment gain	804	823
Benefit payments and plan expenses	(632)	(500)
Plan assets at fair value – end of year	9,602	8,781	7,820
Funded Status:
Unfunded benefit obligation	(5,197)	(7,289)
Amounts recognized in balance sheet at year end:
Other noncurrent liabilities	(5,197)	(7,289)
Pre-tax components in accumulated other comprehensive income:
Net actuarial loss (gain)	4,125	6,201
Net prior service cost	0	0
Net transaction (asset) obligations	0	0
Total amount recognized	4,125	6,201
Accumulated Benefit Obligation	14,799	16,070
Assumed discount rate	4.70%	4.00%
Expected return on assets	6.00%	7.00%
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	0	0
Wrexham Plan [Member]
Net Periodic Pension Cost:
Service cost	0	0
Interest cost	635	654
Expected return on assets	(819)	(787)
Amortization of net loss (gain)	0	0
Amortization of net loss (gain)	0	0
Net periodic benefit cost	(184)	(133)
Change in Benefit Obligation:
Benefit obligation – beginning of year	15,462		13,689
Service cost	0	0
Interest cost	635	654
Actuarial (gain)	(7)	1,238
Pension settlement	0	0
Net benefit payments	(716)	(706)
Benefit obligation – end of year	15,745	15,462	13,689
Change in Plan Assets:
Plan assets at fair value – beginning of year	12,997		11,518
Company contributions	526	499
Investment gain	2,054	1,191
Benefit payments and plan expenses	(716)	(706)
Plan assets at fair value – end of year	15,172	12,997	11,518
Funded Status:
Unfunded benefit obligation	(573)	(2,465)
Amounts recognized in balance sheet at year end:
Other noncurrent liabilities	(573)	(2,465)
Pre-tax components in accumulated other comprehensive income:
Net actuarial loss (gain)	1,116	2,303
Net prior service cost	0	0
Net transaction (asset) obligations	0	0
Total amount recognized	1,116	2,303
Accumulated Benefit Obligation	15,745	15,462
Assumed discount rate	4.40%	4.10%
Expected return on assets	7.00%	6.20%
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	371	587
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	311	495
Directors Plans [Member]
Net Periodic Pension Cost:
Service cost	929	1,625
Interest cost	360	553
Expected return on assets	0	0
Amortization of net loss (gain)	(145)	(405)
Amortization of net loss (gain)	0	0
Net periodic benefit cost	1,144	1,773
Change in Benefit Obligation:
Benefit obligation – beginning of year	8,993		11,378
Service cost	929	1,625
Interest cost	360	553
Actuarial (gain)	(1,467)	(4,563)
Pension settlement	0	0
Net benefit payments	0	0
Benefit obligation – end of year	8,815	8,993	11,378
Change in Plan Assets:
Plan assets at fair value – beginning of year	0		0
Company contributions	0	0
Investment gain	0	0
Benefit payments and plan expenses	0	0
Plan assets at fair value – end of year	0	0	0
Funded Status:
Unfunded benefit obligation	(8,815)	(8,993)
Amounts recognized in balance sheet at year end:
Other noncurrent liabilities	(8,815)	(8,993)
Pre-tax components in accumulated other comprehensive income:
Net actuarial loss (gain)	(2,944)	(1,622)
Net prior service cost	0	0
Net transaction (asset) obligations	0	0
Total amount recognized	(2,944)	(1,622)
Accumulated Benefit Obligation	5,473	4,764
Salary growth rate	10.00%	10.00%
Assumed discount rate	4.70%	4.00%
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	$ 0	$ 0