Business Acquisitions - Narrative (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2012 NP Coil Dexter [Member]	Sep. 30, 2012 NP Coil Dexter [Member]	Sep. 30, 2012 NP Coil Dexter [Member] Customer Lists [Member]	Sep. 30, 2012 NP Coil Dexter [Member] Customer Relationships [Member]	Sep. 30, 2012 NP Coil Dexter [Member] Noncompete Agreements [Member]	Sep. 30, 2012 NP Coil Dexter [Member] Trademarks [Member]	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				$ 2,748					$ 647		$ 1,831
Short-term Debt				1,186
Long-term Debt				854
Goodwill	58,511	59,169		1,786							277
Intangibles				3,825							830
Intangible Assets, Amortizable Life					8 years	4 years	5 years	10 years		5 years		10 years	4 years	10 years
Cash Acquired				113
Change in Fair Value Estimate			$ 1,033