Financial Guarantees and Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 80,471	$ 97,879	$ 78,070	$ 72,742
Accounts receivable, net	144,192	131,569
Inventories, net	97,769	94,964
Deferred income taxes	3,864	3,832
Other current assets	40,861	33,414
Total current assets	367,157	361,658
Property, plant and equipment, net	478,598	479,169
Goodwill	80,782	80,608
Intangible assets, net	74,591	75,663
Net investment in and advances to (from) subsidiaries	0	0
Deferred income taxes	1,392	945
Other noncurrent assets	24,777	24,026
Total assets	1,027,297	1,022,069
Current liabilities:
Short-term borrowings	1,138	813
Accounts payable and accrued liabilities	210,864	196,905
Income taxes payable	2,476	3,841
Deferred income taxes	479	479
Current portion of long-term debt	20,501	19,477
Total current liabilities	235,458	221,515
Long-term debt	589,247	579,399
Deferred income taxes	32,839	33,181
Other noncurrent liabilities	40,535	48,772
Total liabilities	898,079	882,867
Common stock	0	0
Other shareholders’ equity	129,218	139,202
Total shareholders' equity	129,218	139,202
Total liabilities and shareholders' equity	1,027,297	1,022,069
PGI (Issuer)
Current assets:
Cash and cash equivalents	699	486	9,997	3,135
Accounts receivable, net	0	0
Inventories, net	(76)	0
Deferred income taxes	0	0
Other current assets	4,466	1,821
Total current assets	5,089	2,307
Property, plant and equipment, net	1,419	27,711
Goodwill	0	0
Intangible assets, net	22,684	24,313
Net investment in and advances to (from) subsidiaries	701,902	679,818
Deferred income taxes	0	0
Other noncurrent assets	303	275
Total assets	731,397	734,424
Current liabilities:
Short-term borrowings	1,138	813
Accounts payable and accrued liabilities	37,581	28,511
Income taxes payable	0	0
Deferred income taxes	331	331
Current portion of long-term debt	167	107
Total current liabilities	39,217	29,762
Long-term debt	560,161	560,043
Deferred income taxes	272	273
Other noncurrent liabilities	2,529	5,144
Total liabilities	602,179	595,222
Common stock	0	0
Other shareholders’ equity	129,218	139,202
Total shareholders' equity	129,218	139,202
Total liabilities and shareholders' equity	731,397	734,424
Guarantors
Current assets:
Cash and cash equivalents	18,908	28,285	17,800	14,574
Accounts receivable, net	28,195	22,350
Inventories, net	22,238	23,843
Deferred income taxes	613	613
Other current assets	9,556	7,710
Total current assets	79,510	82,801
Property, plant and equipment, net	95,052	99,660
Goodwill	20,718	20,718
Intangible assets, net	41,008	42,422
Net investment in and advances to (from) subsidiaries	758,438	723,861
Deferred income taxes	0	0
Other noncurrent assets	5,629	5,787
Total assets	1,000,355	975,249
Current liabilities:
Short-term borrowings	0	0
Accounts payable and accrued liabilities	36,793	33,344
Income taxes payable	0	89
Deferred income taxes	0	0
Current portion of long-term debt	0	0
Total current liabilities	36,793	33,433
Long-term debt	0	0
Deferred income taxes	9,149	9,149
Other noncurrent liabilities	11,675	15,540
Total liabilities	57,617	58,122
Common stock	0	0
Other shareholders’ equity	942,738	917,127
Total shareholders' equity	942,738	917,127
Total liabilities and shareholders' equity	1,000,355	975,249
Non-Guarantors
Current assets:
Cash and cash equivalents	60,864	69,108	50,273	55,033
Accounts receivable, net	115,997	109,219
Inventories, net	75,607	71,121
Deferred income taxes	3,864	3,832
Other current assets	26,839	23,883
Total current assets	283,171	277,163
Property, plant and equipment, net	382,127	351,798
Goodwill	60,064	59,890
Intangible assets, net	10,899	8,928
Net investment in and advances to (from) subsidiaries	(213,382)	(188,670)
Deferred income taxes	1,392	945
Other noncurrent assets	18,845	17,964
Total assets	543,116	528,018
Current liabilities:
Short-term borrowings	0	0
Accounts payable and accrued liabilities	136,490	135,050
Income taxes payable	2,476	3,752
Deferred income taxes	14	14
Current portion of long-term debt	20,334	19,370
Total current liabilities	159,314	158,186
Long-term debt	29,086	19,356
Deferred income taxes	24,166	24,506
Other noncurrent liabilities	26,331	28,088
Total liabilities	238,897	230,136
Common stock	36,083	36,083
Other shareholders’ equity	268,136	261,799
Total shareholders' equity	304,219	297,882
Total liabilities and shareholders' equity	543,116	528,018
Eliminations
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories, net	0	0
Deferred income taxes	(613)	(613)
Other current assets	0	0
Total current assets	(613)	(613)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Net investment in and advances to (from) subsidiaries	(1,246,958)	(1,215,009)
Deferred income taxes	0	0
Other noncurrent assets	0	0
Total assets	(1,247,571)	(1,215,622)
Current liabilities:
Short-term borrowings	0	0
Accounts payable and accrued liabilities	0	0
Income taxes payable	0	0
Deferred income taxes	134	134
Current portion of long-term debt	0	0
Total current liabilities	134	134
Long-term debt	0	0
Deferred income taxes	(748)	(747)
Other noncurrent liabilities	0	0
Total liabilities	(614)	(613)
Common stock	(36,083)	(36,083)
Other shareholders’ equity	(1,210,874)	(1,178,926)
Total shareholders' equity	(1,246,957)	(1,215,009)
Total liabilities and shareholders' equity	$ (1,247,571)	$ (1,215,622)