Intangible Assets Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 28, 2014	Jun. 30, 2015	Jun. 28, 2014	Jun. 04, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 182,573		$ 182,573			$ 178,911
Intangible assets	3,683	$ 2,547	6,447	$ 5,164
Loan acquisition costs	1,586	1,274	3,240	2,300
Total	5,269	$ 3,821	9,687	$ 7,464
Amortization in 2014	18,000		18,000
Amortization in 2015	18,000		18,000
Amortization of 2016	18,000		18,000
Amortization of 2017	18,000		18,000
Amortization of 2018	18,000		18,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	65,778		65,778			63,507
Finite-lived intangible asset	81,082		81,082			76,242
Technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	46,167		46,167			48,824
Finite-lived intangible asset	$ 63,726		$ 63,726			$ 63,726
Polymer Group, Inc. | Trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset					$ 1,600