Financial Guarantees and Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Operating activities:
Net cash (used in) provided by operating activities	$ 4,106	$ 55,630
Investing activities:
Purchases of property, plant and equipment	(35,499)	(40,146)
Proceeds from sale of assets	25	1,657
Acquisition of intangibles and other	(4,486)	(175)
Intercompany investing activities, net	0	0
Net cash provided by (used in) investing activities	(39,960)	(38,664)
Financing activities:
Proceeds from long-term borrowings	18,490	10,977
Proceeds from short-term borrowings	1,879	4,943
Repayment of long-term borrowings	(5,266)	(3,249)
Repayment of short-term borrowings	(2,476)	(6,894)
Intercompany financing activities, net	0	0
Net cash provided by (used in) financing activities	12,405	5,777
Effect of exchange rate changes on cash	248	(386)
Net change in cash and cash equivalents	(23,201)	22,357
Cash and cash equivalents - beginning of period	97,879	72,742
Cash and cash equivalents - end of period	74,678	95,099
PGI (Issuer)
Operating activities:
Net cash (used in) provided by operating activities	(42,502)	(73,342)
Investing activities:
Purchases of property, plant and equipment	(23,703)	(20,399)
Proceeds from sale of assets	0	0
Acquisition of intangibles and other	(260)	(175)
Intercompany investing activities, net	6,408	57,118
Net cash provided by (used in) investing activities	(17,555)	36,544
Financing activities:
Proceeds from long-term borrowings	234	0
Proceeds from short-term borrowings	1,879	1,943
Repayment of long-term borrowings	(109)	(79)
Repayment of short-term borrowings	(2,476)	(1,894)
Intercompany financing activities, net	61,800	41,253
Net cash provided by (used in) financing activities	61,106	41,223
Effect of exchange rate changes on cash	0	0
Net change in cash and cash equivalents	1,049	4,425
Cash and cash equivalents - beginning of period	486	3,135
Cash and cash equivalents - end of period	1,535	7,560
Guarantors
Operating activities:
Net cash (used in) provided by operating activities	46,834	70,705
Investing activities:
Purchases of property, plant and equipment	(2,663)	(2,483)
Proceeds from sale of assets	0	1,646
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	(59,073)	(37,389)
Net cash provided by (used in) investing activities	(61,736)	(38,226)
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	(1,408)	(23,530)
Net cash provided by (used in) financing activities	(1,408)	(23,530)
Effect of exchange rate changes on cash	0	0
Net change in cash and cash equivalents	(16,310)	8,949
Cash and cash equivalents - beginning of period	28,285	14,574
Cash and cash equivalents - end of period	11,975	23,523
Non-Guarantors
Operating activities:
Net cash (used in) provided by operating activities	(226)	58,267
Investing activities:
Purchases of property, plant and equipment	(9,133)	(17,264)
Proceeds from sale of assets	25	11
Acquisition of intangibles and other	(4,226)	0
Intercompany investing activities, net	(5,000)	(25,118)
Net cash provided by (used in) investing activities	(18,334)	(42,371)
Financing activities:
Proceeds from long-term borrowings	18,256	10,977
Proceeds from short-term borrowings	0	3,000
Repayment of long-term borrowings	(5,157)	(3,170)
Repayment of short-term borrowings	0	(5,000)
Intercompany financing activities, net	(2,727)	(12,334)
Net cash provided by (used in) financing activities	10,372	(6,527)
Effect of exchange rate changes on cash	248	(386)
Net change in cash and cash equivalents	(7,940)	8,983
Cash and cash equivalents - beginning of period	69,108	55,033
Cash and cash equivalents - end of period	61,168	64,016
Eliminations
Operating activities:
Net cash (used in) provided by operating activities	0	0
Investing activities:
Purchases of property, plant and equipment	0	0
Proceeds from sale of assets	0	0
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	57,665	5,389
Net cash provided by (used in) investing activities	57,665	5,389
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	(57,665)	(5,389)
Net cash provided by (used in) financing activities	(57,665)	(5,389)
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	(222)
Successor [Member] | PGI (Issuer)
Condensed Financial Statements, Captions [Line Items]
Proceeds from Issuance of Common Stock	(222)
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