Acquisitions Allocation of Purchase Price (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Jul. 09, 2012 Palsticos Novel S.A. [Member]	Oct. 02, 2012 Jamco [Member]
Assets acquired:
Cash			$ 630	$ 88
Accounts receivable			5,467	1,690
Inventory			5,993	3,282
Property, plant and equipment			13,636	2,559
Intangibles			5,790	5,680
Deferred tax assets			435	28
Prepaid assets			1,451	48
Other			719	2
Assets acquired, less cash			33,491	13,289
Liabilities assumed:
Accounts payable and accruals			3,134	1,436
Other taxes			3,608	676
Other long-term liabilities			2,293	454
Debt			26,028	0
Deferred tax liabilities			3,804	3,044
Liabilities assumed			38,867	5,610
Goodwill	61,039	61,056	8,805	7,435
Total consideration, less cash acquired			$ 3,429	$ 15,114