Financial Guarantees and Condensed Consolidating Statement of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		1 Months Ended	11 Months Ended	12 Months Ended		1 Months Ended	11 Months Ended	12 Months Ended		1 Months Ended	11 Months Ended	12 Months Ended		1 Months Ended	11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2011 Successor	Dec. 28, 2013 Successor	Dec. 29, 2012 Successor	Jan. 28, 2011 Predecessor	Dec. 31, 2011 PGI (Issuer) Successor	Dec. 28, 2013 PGI (Issuer) Successor	Dec. 29, 2012 PGI (Issuer) Successor	Jan. 28, 2011 PGI (Issuer) Predecessor	Dec. 31, 2011 Guarantors Successor	Dec. 28, 2013 Guarantors Successor	Dec. 29, 2012 Guarantors Successor	Jan. 28, 2011 Guarantors Predecessor	Dec. 31, 2011 Non-Guarantors Successor	Dec. 28, 2013 Non-Guarantors Successor	Dec. 29, 2012 Non-Guarantors Successor	Jan. 28, 2011 Non-Guarantors Predecessor	Dec. 31, 2011 Eliminations Successor	Dec. 28, 2013 Eliminations Successor	Dec. 29, 2012 Eliminations Successor	Jan. 28, 2011 Eliminations Predecessor
Condensed Financial Statements, Captions [Line Items]
Less: Earnings attributable to noncontrolling interests	$ 59	$ (34)	$ 0	$ 83	$ 0	$ 0		$ 0	$ 0	$ 0		$ 0	$ 59	$ (34)		$ 83	$ 0	$ 0		$ 0
Operating activities:
Net cash (used in) provided by operating activities	24,117	16,850	75,471	(25,270)	(39,211)	(97,500)	(81,186)	(40,725)	27,013	64,440	77,313	6,886	36,315	49,910	79,344	8,569	0	0	0	0
Investing activities:
Acquisitions, net of cash acquired	(403,496)	(278,970)	0	0	(403,496)	(278,970)			0	0			0	0			0	0
Purchases of property, plant and equipment	(68,428)	(54,642)	(51,625)	(8,405)	(21,599)	(1,356)	(26,043)	(28)	(11,183)	(9,841)	(4,021)	(5,652)	(35,646)	(43,445)	(21,561)	(2,725)	0	0	0	0
Proceeds from sale of assets	11,395	435	1,660	105	0	0	0	0	85	0	1,646	65	11,310	435	14	40	0	0	0	0
Acquisition of noncontrolling interest	(7,246)	0	0	0	0				0				(7,246)				0
Acquisition of intangibles and other	(193)	(4,582)	(268)	(5)	(177)	(356)	(268)	(5)	0	0	0	0	(16)	(4,226)	0	0	0	0	0	0
Intercompany investing activities, net	0	0	0	0	3,519	(12,783)	57,118	2,805	15,434	(81,373)	(37,797)	(5,250)	(20,572)	(15,000)	(25,218)	(4,000)	1,619	109,156	5,897	6,445
Net cash provided by (used in) investing activities	(467,968)	(337,759)	(50,233)	(8,305)	(421,753)	(293,465)	30,807	2,772	4,336	(91,214)	(40,172)	(10,837)	(52,170)	(62,236)	(46,765)	(6,685)	1,619	109,156	5,897	6,445
Financing activities:
Proceeds from issuance of Senior Secured Notes	560,000	0	0	0	560,000				0				0				0
Issuance of common stock	259,807	30,504	1,087	0	259,807	30,504	1,087		0	0	0		0	0	0		0	0	0
Proceeds from long-term borrowings	10,281	629,999	10,977	31,500	0	612,602	0	31,500	0	0	0	0	10,281	17,397	10,977	0	0	0	0	0
Proceeds from short-term borrowings	8,245	4,087	5,725	631	0	2,216	2,725	631	0	0	0	0	8,245	1,871	3,000	0	0	0	0	0
Repayment of Term Loan	(286,470)	0	0	0	(286,470)				0				0				0
Repayment of long-term borrowings	(51,045)	(337,679)	(7,678)	(24)	(31,541)	(318,154)	(107)	0	0	0	0	0	(19,504)	(19,525)	(7,571)	(24)	0	0	0	0
Repayment of short-term borrowings	(36,456)	(2,619)	(9,933)	(665)	(631)	(2,619)	(1,933)	0	0	0	0	0	(35,825)	0	(8,000)	(665)	0	0	0	0
Loan acquisition costs	(19,252)	(16,102)	(220)	0	(19,252)	(16,102)	(220)		0	0	0		0	0	0		0	0	0
Intercompany financing activities, net	0	0	0	0	(17,856)	84,100	46,178	5,250	(19,985)	11,592	(23,430)	2,872	39,460	13,464	(16,851)	(1,677)	(1,619)	(109,156)	(5,897)	(6,445)
Net cash provided by (used in) financing activities	445,110	308,190	(42)	31,442	464,057	392,547	47,730	37,381	(19,985)	11,592	(23,430)	2,872	2,657	13,207	(18,445)	(2,366)	(1,619)	(109,156)	(5,897)	(6,445)
Effect of exchange rate changes on cash	712	904	(59)	549	0	0	0	0	0	0	0	0	712	904	(59)	549	0	0	0	0
Net change in cash and cash equivalents	1,971	(11,815)	25,137	(1,584)	3,093	1,582	(2,649)	(572)	11,364	(15,182)	13,711	(1,079)	(12,486)	1,785	14,075	67	0	0	0	0
Cash and cash equivalents at beginning of period	70,771	97,879	72,742	72,355		486	3,135	614		28,285	14,574	4,289		69,108	55,033	67,452		0	0	0
Cash and cash equivalents at end of period	$ 72,742	$ 86,064	$ 97,879	$ 70,771	$ 3,135	$ 2,068	$ 486	$ 42	$ 14,574	$ 13,103	$ 28,285	$ 3,210	$ 55,033	$ 70,893	$ 69,108	$ 67,519	$ 0	$ 0	$ 0	$ 0