Financial Guarantees and Condensed Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013	Mar. 30, 2013	Dec. 29, 2012
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Current Maturities	$ 12,333	$ 13,797
Other Liabilities, Noncurrent	59,809	61,845
Liabilities	1,289,437	1,292,471
Liabilities, Current	327,340	329,066
Current assets:
Cash and cash equivalents	59,640	86,064	74,627	97,879
Accounts receivable, net	213,301	194,827
Inventories, net	152,282	156,365
Deferred income taxes	3,023	2,318
Other current assets	76,627	59,096
Total current assets	504,873	498,670
Property, plant and equipment, net of accumulated depreciation of $192,933 and $175,130, respectively	611,016	623,279
Goodwill	120,305	120,143
Intangible assets, net	164,405	168,179
Net investment in and advances to (from) subsidiaries	0	0
Deferred income taxes	2,499	2,582
Other noncurrent assets	26,939	26,052
Total assets	1,430,037	1,438,905
Common stock	0	0
Stockholders' Equity Attributable to Parent	139,747	145,591
Noncontrolling interests	853	843
Total equity	140,600	146,434
Total liabilities and equity	1,430,037	1,438,905
Short-term borrowings	8,147	2,472
Long-term Debt, Excluding Current Maturities	878,656	880,399
Deferred Tax Liabilities, Net, Noncurrent	23,632	21,161
Accounts Payable and Accrued Liabilities, Current	302,094	307,661
Accrued Income Taxes, Current	3,571	3,613
Deferred Tax Liabilities, Net, Current	1,195	1,523
PGI (Issuer)
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Current Maturities	3,015	3,039
Other Liabilities, Noncurrent	355	1,810
Liabilities	885,488	893,879
Liabilities, Current	33,340	40,328
Current assets:
Cash and cash equivalents	764	2,068	4,060	486
Accounts receivable, net	0	0
Inventories, net	(199)	0
Deferred income taxes	385	385
Other current assets	15,620	1,887
Total current assets	16,570	4,340
Property, plant and equipment, net of accumulated depreciation of $192,933 and $175,130, respectively	3,068	2,756
Goodwill	0	0
Intangible assets, net	30,270	31,525
Net investment in and advances to (from) subsidiaries	975,032	1,000,551
Deferred income taxes	0	0
Other noncurrent assets	295	298
Total assets	1,025,235	1,039,470
Common stock	0	0
Stockholders' Equity Attributable to Parent	139,747	145,591
Noncontrolling interests	0	0
Total equity	139,747	145,591
Total liabilities and equity	1,025,235	1,039,470
Short-term borrowings	956	410
Long-term Debt, Excluding Current Maturities	850,822	850,767
Deferred Tax Liabilities, Net, Noncurrent	971	974
Accounts Payable and Accrued Liabilities, Current	28,869	36,510
Accrued Income Taxes, Current	500	369
Deferred Tax Liabilities, Net, Current	0	0
Guarantors
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Current Maturities	0	0
Other Liabilities, Noncurrent	30,810	31,372
Liabilities	102,524	101,375
Liabilities, Current	63,660	61,950
Current assets:
Cash and cash equivalents	10,342	13,103	15,234	28,285
Accounts receivable, net	46,349	46,828
Inventories, net	46,210	46,595
Deferred income taxes	2,438	2,438
Other current assets	14,499	12,696
Total current assets	119,838	121,660
Property, plant and equipment, net of accumulated depreciation of $192,933 and $175,130, respectively	175,713	176,380
Goodwill	43,161	43,182
Intangible assets, net	110,619	112,026
Net investment in and advances to (from) subsidiaries	623,322	615,314
Deferred income taxes	0	0
Other noncurrent assets	8,199	8,869
Total assets	1,080,852	1,077,431
Common stock	0	0
Stockholders' Equity Attributable to Parent	978,328	976,056
Noncontrolling interests	0	0
Total equity	978,328	976,056
Total liabilities and equity	1,080,852	1,077,431
Short-term borrowings	0	0
Long-term Debt, Excluding Current Maturities	0	0
Deferred Tax Liabilities, Net, Noncurrent	8,054	8,053
Accounts Payable and Accrued Liabilities, Current	63,660	61,950
Accrued Income Taxes, Current	0	0
Deferred Tax Liabilities, Net, Current	0	0
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Current Maturities	9,318	10,758
Other Liabilities, Noncurrent	28,644	28,663
Liabilities	304,246	300,039
Liabilities, Current	229,193	225,640
Current assets:
Cash and cash equivalents	48,534	70,893	55,333	69,108
Accounts receivable, net	166,952	147,999
Inventories, net	106,271	109,770
Deferred income taxes	3,023	2,318
Other current assets	46,508	44,513
Total current assets	371,288	375,493
Property, plant and equipment, net of accumulated depreciation of $192,933 and $175,130, respectively	432,235	444,143
Goodwill	77,144	76,961
Intangible assets, net	23,516	24,628
Net investment in and advances to (from) subsidiaries	(356,982)	(363,414)
Deferred income taxes	2,499	2,582
Other noncurrent assets	18,445	16,885
Total assets	568,145	577,278
Common stock	16,966	16,966
Stockholders' Equity Attributable to Parent	246,080	259,430
Noncontrolling interests	853	843
Total equity	263,899	277,239
Total liabilities and equity	568,145	577,278
Short-term borrowings	7,191	2,062
Long-term Debt, Excluding Current Maturities	27,834	29,632
Deferred Tax Liabilities, Net, Noncurrent	18,575	16,104
Accounts Payable and Accrued Liabilities, Current	209,565	209,201
Accrued Income Taxes, Current	3,071	3,244
Deferred Tax Liabilities, Net, Current	48	375
Eliminations
Condensed Financial Statements, Captions [Line Items]
Long-term Debt, Current Maturities	0	0
Other Liabilities, Noncurrent	0	0
Liabilities	(2,821)	(2,822)
Liabilities, Current	1,147	1,148
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories, net	0	0
Deferred income taxes	(2,823)	(2,823)
Other current assets	0	0
Total current assets	(2,823)	(2,823)
Property, plant and equipment, net of accumulated depreciation of $192,933 and $175,130, respectively	0	0
Goodwill	0	0
Intangible assets, net	0	0
Net investment in and advances to (from) subsidiaries	(1,241,372)	(1,252,451)
Deferred income taxes	0	0
Other noncurrent assets	0	0
Total assets	(1,244,195)	(1,255,274)
Common stock	(16,966)	(16,966)
Stockholders' Equity Attributable to Parent	(1,224,408)	(1,235,486)
Noncontrolling interests	0	0
Total equity	(1,241,374)	(1,252,452)
Total liabilities and equity	(1,244,195)	(1,255,274)
Short-term borrowings	0	0
Long-term Debt, Excluding Current Maturities	0	0
Deferred Tax Liabilities, Net, Noncurrent	(3,968)	(3,970)
Accounts Payable and Accrued Liabilities, Current	0	0
Accrued Income Taxes, Current	0	0
Deferred Tax Liabilities, Net, Current	$ 1,147	$ 1,148