Financial Guarantees and Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 74,627	$ 97,879	$ 79,621	$ 72,742
Accounts receivable, net	139,848	131,569
Inventories, net	96,892	94,964
Deferred income taxes	3,806	3,832
Other current assets	40,078	33,414
Total current assets	355,251	361,658
Property, plant and equipment, net	477,958	479,169
Goodwill	80,712	80,608
Intangible assets, net	73,637	75,663
Net investment in and advances to (from) subsidiaries	0	0
Deferred income taxes	1,222	945
Other noncurrent assets	24,855	24,026
Total assets	1,013,635	1,022,069
Current liabilities:
Short-term borrowings	1,411	813
Accounts payable and accrued liabilities	193,176	196,905
Income taxes payable	3,716	3,841
Deferred income taxes	479	479
Current portion of long-term debt	21,463	19,477
Total current liabilities	220,245	221,515
Long-term debt	583,199	579,399
Deferred income taxes	33,045	33,181
Other noncurrent liabilities	47,611	48,772
Total liabilities	884,100	882,867
Common stock	0	0
Other shareholders’ equity	129,535	139,202
Total shareholders' equity	129,535	139,202
Total liabilities and shareholders' equity	1,013,635	1,022,069
PGI (Issuer)
Current assets:
Cash and cash equivalents	4,060	486	6,196	3,135
Accounts receivable, net	0	0
Inventories, net	(52)	0
Deferred income taxes	0	0
Other current assets	3,908	1,821
Total current assets	7,916	2,307
Property, plant and equipment, net	38,212	27,711
Goodwill	0	0
Intangible assets, net	23,483	24,313
Net investment in and advances to (from) subsidiaries	644,908	679,818
Deferred income taxes	0	0
Other noncurrent assets	306	275
Total assets	714,825	734,424
Current liabilities:
Short-term borrowings	1,411	813
Accounts payable and accrued liabilities	17,985	28,511
Income taxes payable	0	0
Deferred income taxes	331	331
Current portion of long-term debt	107	107
Total current liabilities	19,834	29,762
Long-term debt	560,019	560,043
Deferred income taxes	273	273
Other noncurrent liabilities	5,164	5,144
Total liabilities	585,290	595,222
Common stock	0	0
Other shareholders’ equity	129,535	139,202
Total shareholders' equity	129,535	139,202
Total liabilities and shareholders' equity	714,825	734,424
Guarantors
Current assets:
Cash and cash equivalents	15,234	28,285	10,851	14,574
Accounts receivable, net	24,913	22,350
Inventories, net	21,025	23,843
Deferred income taxes	613	613
Other current assets	10,017	7,710
Total current assets	71,802	82,801
Property, plant and equipment, net	96,687	99,660
Goodwill	20,718	20,718
Intangible assets, net	41,715	42,422
Net investment in and advances to (from) subsidiaries	756,142	723,861
Deferred income taxes	0	0
Other noncurrent assets	5,645	5,787
Total assets	992,709	975,249
Current liabilities:
Short-term borrowings	0	0
Accounts payable and accrued liabilities	38,875	33,344
Income taxes payable	0	89
Deferred income taxes	0	0
Current portion of long-term debt	0	0
Total current liabilities	38,875	33,433
Long-term debt	0	0
Deferred income taxes	9,149	9,149
Other noncurrent liabilities	14,935	15,540
Total liabilities	62,959	58,122
Common stock	0	0
Other shareholders’ equity	929,750	917,127
Total shareholders' equity	929,750	917,127
Total liabilities and shareholders' equity	992,709	975,249
Non-Guarantors
Current assets:
Cash and cash equivalents	55,333	69,108	62,574	55,033
Accounts receivable, net	114,935	109,219
Inventories, net	75,919	71,121
Deferred income taxes	3,806	3,832
Other current assets	26,153	23,883
Total current assets	276,146	277,163
Property, plant and equipment, net	343,059	351,798
Goodwill	59,994	59,890
Intangible assets, net	8,439	8,928
Net investment in and advances to (from) subsidiaries	(169,899)	(188,670)
Deferred income taxes	1,222	945
Other noncurrent assets	18,904	17,964
Total assets	537,865	528,018
Current liabilities:
Short-term borrowings	0	0
Accounts payable and accrued liabilities	136,316	135,050
Income taxes payable	3,716	3,752
Deferred income taxes	14	14
Current portion of long-term debt	21,356	19,370
Total current liabilities	161,402	158,186
Long-term debt	23,180	19,356
Deferred income taxes	24,370	24,506
Other noncurrent liabilities	27,512	28,088
Total liabilities	236,464	230,136
Common stock	36,083	36,083
Other shareholders’ equity	265,318	261,799
Total shareholders' equity	301,401	297,882
Total liabilities and shareholders' equity	537,865	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	(1,231,151)	(1,215,009)
Deferred income taxes	0	0
Other noncurrent assets	0	0
Total assets	(1,231,764)	(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	(747)	(747)
Other noncurrent liabilities	0	0
Total liabilities	(613)	(613)
Common stock	(36,083)	(36,083)
Other shareholders’ equity	(1,195,068)	(1,178,926)
Total shareholders' equity	(1,231,151)	(1,215,009)
Total liabilities and shareholders' equity	$ (1,231,764)	$ (1,215,622)