Business Acquisitions - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended				3 Months Ended			12 Months Ended			3 Months Ended		12 Months Ended		3 Months Ended				12 Months Ended		3 Months Ended					3 Months Ended		3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011 Summit [Member]	Dec. 31, 2013 Summit [Member]	Dec. 31, 2012 Summit [Member]	Dec. 31, 2011 Summit [Member]	Dec. 31, 2010 Summit [Member]	Dec. 31, 2010 Summit [Member] Customer Lists [Member]	Dec. 31, 2010 Summit [Member] Noncompete Agreements [Member]	Dec. 31, 2010 Summit [Member] Other Intangible Assets [Member]	Dec. 31, 2012 TQM [Member]	Dec. 31, 2011 TQM [Member]	Sep. 30, 2011 TQM [Member]	Sep. 30, 2011 TQM [Member] Customer Lists [Member]	Sep. 30, 2011 TQM [Member] Trade Names [Member]	Dec. 31, 2012 GW Smith [Member]	Dec. 31, 2011 GW Smith [Member]	Dec. 31, 2011 GW Smith [Member] Customer Lists [Member]	Dec. 31, 2011 GW Smith [Member] Noncompete Agreements [Member]	Dec. 31, 2011 GW Smith [Member] Trademarks [Member]	Dec. 31, 2011 GW Smith [Member] Trade Names [Member]	Dec. 31, 2012 NPCoil Dexter [Member]	Sep. 30, 2012 NPCoil Dexter [Member]	Sep. 30, 2012 NPCoil Dexter [Member] Customer Lists [Member]	Sep. 30, 2012 NPCoil Dexter [Member] Customer Relationships [Member]	Sep. 30, 2012 NPCoil Dexter [Member] Noncompete Agreements [Member]	Sep. 30, 2012 NPCoil Dexter [Member] Trademarks [Member]	Mar. 31, 2013 Distribution Network [Member]	Mar. 31, 2013 Distribution Network [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] Other Intangible Assets [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisition								$ 29,116					$ 10,500	$ 10,500				$ 14,518						$ 2,748					$ 647		$ 1,831
Long-term Debt																								(854)
Short-term Debt																								(1,186)
Goodwill	58,151	59,169	58,152					3,423					6,773	6,773				1,120						1,786							277
Intangibles								17,100					3,556	3,556				6,260						3,825							830
Intangible Assets, Amortizable Life									20 years	5 years	15 years				20 years	5 years			16 years	5 years	5 years	15 years			8 years	4 years	5 years	10 years		5 years		10 years	4 years	10 years
Percentage of Voting Interests Acquired														60.00%
Post Closing Adjustment				717
Contingent Consideration Paid												2,000					1,000
Non cash gain from purchase of equity affiliate	0	0	(2,718)
Present Value of Holdback													1,754					869						927					100
Cash Acquired														236				22						113
Change in Fair Value Estimate	$ (497)	$ (2,770)	$ (595)		$ (497)	$ (1,737)	$ (595)																$ 1,033