Business Acquisitions - Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2013 Socomor [Member]	Mar. 31, 2013 Socomor [Member] Customer Lists [Member]	Jun. 30, 2013 Tin Plating [Member]	Jun. 30, 2013 Tin Plating [Member] Customer Lists [Member]	Jun. 30, 2013 Tin Plating [Member] Noncompete Agreements [Member]	Jun. 30, 2013 Tin Plating [Member] Formulations And Product Technology[Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions	$ 0	$ 647		$ 647		$ 1,831
Goodwill	58,633		58,151			277
Intangibles						$ 830
Intangible Assets, Amortizable Life					5 years		10 years	4 years	10 years