Financial Guarantees and Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ (14,589)	$ (14,711)
Effect of Exchange Rate on Cash and Cash Equivalents	(512)	(534)
Cash and Cash Equivalents, Period Increase (Decrease)	(26,424)	(23,252)
Less: Earnings attributable to noncontrolling interests	(16)	0
Investing activities:
Purchases of property, plant and equipment	(14,115)	(14,317)
Proceeds from sale of assets	0	11
Acquisition of intangibles and other	(57)	(53)
Intercompany investing activities, net	0	0
Net Cash Provided by (Used in) Investing Activities	(14,172)	(14,359)
Financing activities:
Proceeds from long-term borrowings	3,152	6,666
Proceeds from short-term borrowings	7,606	1,446
Repayment of long-term borrowings	(5,960)	(912)
Repayment of short-term borrowings	(1,949)	(848)
Intercompany financing activities, net	0	0
Cash and cash equivalents at beginning of period	86,064	97,879
Cash and cash equivalents at end of period	59,640	74,627
Net Cash Provided by (Used in) Financing Activities	2,849	6,352
PGI (Issuer)
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(35,352)	(15,118)
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(1,304)	3,574
Less: Earnings attributable to noncontrolling interests	0
Investing activities:
Purchases of property, plant and equipment	(746)	(10,592)
Proceeds from sale of assets		0
Acquisition of intangibles and other	(57)	(53)
Intercompany investing activities, net	11,035	5,766
Net Cash Provided by (Used in) Investing Activities	10,232	(4,879)
Financing activities:
Proceeds from long-term borrowings	3,000	0
Proceeds from short-term borrowings	1,024	1,446
Repayment of long-term borrowings	(3,898)	(27)
Repayment of short-term borrowings	(478)	(848)
Intercompany financing activities, net	24,168	23,000
Cash and cash equivalents at beginning of period	2,068	486
Cash and cash equivalents at end of period	764	4,060
Net Cash Provided by (Used in) Financing Activities	23,816	23,571
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	30,624	16,397
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(2,761)	(13,051)
Less: Earnings attributable to noncontrolling interests	0
Investing activities:
Purchases of property, plant and equipment	(5,795)	(682)
Proceeds from sale of assets		0
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	(16,505)	(23,000)
Net Cash Provided by (Used in) Investing Activities	(22,300)	(23,682)
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	(11,085)	(5,766)
Cash and cash equivalents at beginning of period	13,103	28,285
Cash and cash equivalents at end of period	10,342	15,234
Net Cash Provided by (Used in) Financing Activities	(11,085)	(5,766)
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	(9,861)	(15,990)
Effect of Exchange Rate on Cash and Cash Equivalents	(512)	(534)
Cash and Cash Equivalents, Period Increase (Decrease)	(22,359)	(13,775)
Less: Earnings attributable to noncontrolling interests	(16)
Investing activities:
Purchases of property, plant and equipment	(7,574)	(3,043)
Proceeds from sale of assets		11
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	50	0
Net Cash Provided by (Used in) Investing Activities	(7,524)	(3,032)
Financing activities:
Proceeds from long-term borrowings	152	6,666
Proceeds from short-term borrowings	6,582	0
Repayment of long-term borrowings	(2,062)	(885)
Repayment of short-term borrowings	(1,471)	0
Intercompany financing activities, net	(7,663)	0
Cash and cash equivalents at beginning of period	70,893	69,108
Cash and cash equivalents at end of period	48,534	55,333
Net Cash Provided by (Used in) Financing Activities	(4,462)	5,781
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by (Used in) Operating Activities	0	0
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Less: Earnings attributable to noncontrolling interests	0
Investing activities:
Purchases of property, plant and equipment	0	0
Proceeds from sale of assets		0
Acquisition of intangibles and other	0	0
Intercompany investing activities, net	5,420	17,234
Net Cash Provided by (Used in) Investing Activities	5,420	17,234
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	(5,420)	(17,234)
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Net Cash Provided by (Used in) Financing Activities	$ (5,420)	$ (17,234)