Acquisitions (Details) (USD $)	6 Months Ended				1 Months Ended					1 Months Ended					1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Developed Technology Rights [Member]	Jun. 30, 2013 Customer Relationships [Member]	Oct. 31, 2012 Jamco [Member]	Oct. 02, 2012 Jamco [Member]	Oct. 02, 2012 Jamco [Member] Customer Relationships [Member]	Oct. 02, 2012 Jamco [Member] Technology [Member]	Oct. 02, 2012 Jamco [Member] Noncompete Agreements [Member]	Jul. 31, 2012 Palsticos Novel S.A. [Member]	Jul. 31, 2011 Palsticos Novel S.A. [Member]	Jul. 09, 2012 Palsticos Novel S.A. [Member]	Jul. 09, 2012 Palsticos Novel S.A. [Member] Developed Technology Rights [Member]	Jul. 09, 2012 Palsticos Novel S.A. [Member] Customer Relationships [Member]	Oct. 31, 2012 Customer Relationships [Member] Jamco [Member]	Oct. 31, 2012 Noncompete Agreements [Member] Jamco [Member]	Oct. 31, 2012 Technology [Member] Jamco [Member]	Oct. 02, 2012 Trade Names [Member] Jamco [Member]	Jul. 09, 2012 Trade Names [Member] Palsticos Novel S.A. [Member]
Business Acquisition [Line Items]
Percentage of entity acquired						100.00%				100.00%
Purchase price of business						$ 15,100,000						$ 30,900,000
Cash acquired						88,000						630,000
Trade name acquired																		1,200,000
Acquired finite-lived intangible assets							2,400,000	2,000,000	100,000
Useful lives of intangible assets acquired			10 years	6 years											6 years	2 years	10 years
Cash payment for acquisition	600,000	0								3,400,000
Cash acquired from acquisition					100,000					600,000
Debt assumed in acquisition						0						26,028,000
Contingent consideration												900,000
Contingency period											4 years
Indefinite-lived trade name acquired																			1,600,000
Finite-lived intangible assets acquired						$ 5,680,000						$ 5,790,000	$ 1,800,000	$ 2,400,000