Financial Guarantees and Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Operating activities:
Net cash (used in) provided by operating activities	$ (1,618)	$ 37,667
Investing activities:
Purchases of property, plant and equipment	(26,500)	(29,630)
Proceeds from sale of assets	75	1,657
Acquisition of intangibles and other	(135)	(110)
Intercompany investing activities, net	0	0
Net cash provided by (used in) investing activities	(26,560)	(28,083)
Financing activities:
Proceeds from long-term borrowings	14,177	25
Proceeds from short-term borrowings	1,879	4,943
Repayment of long-term borrowings	(3,317)	(2,350)
Repayment of short-term borrowings	(1,554)	(6,233)
Intercompany financing activities, net	0	0
Net cash provided by (used in) financing activities	10,953	(3,615)
Effect of exchange rate changes on cash	(183)	(641)
Net change in cash and cash equivalents	(17,408)	5,328
Cash and cash equivalents - beginning of period	97,879	72,742
Cash and cash equivalents - end of period	80,471	78,070
PGI (Issuer)
Operating activities:
Net cash (used in) provided by operating activities	(10,239)	(58,518)
Investing activities:
Purchases of property, plant and equipment	(23,207)	(18,502)
Proceeds from sale of assets	0	19,758
Acquisition of intangibles and other	(135)	(110)
Intercompany investing activities, net	5,766	30,198
Net cash provided by (used in) investing activities	(17,576)	31,344
Financing activities:
Proceeds from long-term borrowings	0	0
Proceeds from short-term borrowings	1,879	1,943
Repayment of long-term borrowings	(65)	(44)
Repayment of short-term borrowings	(1,554)	(1,233)
Intercompany financing activities, net	28,000	33,370
Net cash provided by (used in) financing activities	28,028	34,036
Effect of exchange rate changes on cash	0	0
Net change in cash and cash equivalents	213	6,862
Cash and cash equivalents - beginning of period	486	3,135
Cash and cash equivalents - end of period	699	9,997
Guarantors
Operating activities:
Net cash (used in) provided by operating activities	22,547	44,082
Investing activities:
Purchases of property, plant and equipment	(1,658)	(1,508)
Proceeds from sale of assets	0	1,646
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	(28,500)	(30,554)
Net cash provided by (used in) investing activities	(30,158)	(30,416)
Financing activities:
Proceeds from long-term borrowings	0	0
Proceeds from short-term borrowings	0	0
Repayment of long-term borrowings	0	0
Repayment of short-term borrowings	0	0
Intercompany financing activities, net	(1,766)	(10,440)
Net cash provided by (used in) financing activities	(1,766)	(10,440)
Effect of exchange rate changes on cash	0	0
Net change in cash and cash equivalents	(9,377)	3,226
Cash and cash equivalents - beginning of period	28,285	14,574
Cash and cash equivalents - end of period	18,908	17,800
Non-Guarantors
Operating activities:
Net cash (used in) provided by operating activities	(13,926)	52,103
Investing activities:
Purchases of property, plant and equipment	(1,635)	(29,378)
Proceeds from sale of assets	75	11
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	(4,000)	(19,758)
Net cash provided by (used in) investing activities	(5,560)	(49,125)
Financing activities:
Proceeds from long-term borrowings	14,177	25
Proceeds from short-term borrowings	0	3,000
Repayment of long-term borrowings	(3,252)	(2,306)
Repayment of short-term borrowings	0	(5,000)
Intercompany financing activities, net	500	(2,816)
Net cash provided by (used in) financing activities	11,425	(7,097)
Effect of exchange rate changes on cash	(183)	(641)
Net change in cash and cash equivalents	(8,244)	(4,760)
Cash and cash equivalents - beginning of period	69,108	55,033
Cash and cash equivalents - end of period	60,864	50,273
Eliminations
Operating activities:
Net cash (used in) provided by operating activities	0	0
Investing activities:
Purchases of property, plant and equipment	0	19,758
Proceeds from sale of assets	0	(19,758)
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	26,734	20,114
Net cash provided by (used in) investing activities	26,734	20,114
Financing activities:
Proceeds from long-term borrowings	0	0
Proceeds from short-term borrowings	0	0
Repayment of long-term borrowings	0	0
Repayment of short-term borrowings	0	0
Intercompany financing activities, net	(26,734)	(20,114)
Net cash provided by (used in) financing activities	(26,734)	(20,114)
Effect of exchange rate changes on cash	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Successor [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	(232)
Successor [Member] | PGI (Issuer)
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	(232)
Successor [Member] | Guarantors
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	0
Successor [Member] | Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	0
Successor [Member] | Eliminations
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	$ 0