Business Acquisitions - Table (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010 Summit [Member]	Dec. 31, 2011 TQM [Member]	Sep. 30, 2011 TQM [Member]	Dec. 31, 2011 GW Smith [Member]	Sep. 30, 2012 NPCoil Dexter [Member]	Mar. 31, 2013 Distribution Network [Member]	Jun. 30, 2013 Tin Plating [Member]	Dec. 31, 2011 Total Acquisitions [Member]
Business Acquisition [Line Items]
Current Assets					$ 8,946		$ 6,138	$ 5,536			$ 15,084
Inventory										454
Fixed Assets					4,308		2,869	1,211		270	7,177
Intangibles				17,100	3,556	3,556	6,260	3,825		830	9,816
Goodwill	58,151	59,169	58,152	3,423	6,773	6,773	1,120	1,786		277	7,893
Other Long-term Assets					1,355		1	783			1,356
Total Assets Purchased					24,938		16,388	13,141			41,326
Short-term Debt								(1,186)
Other Current Liabilities					(2,224)		(1,001)	(6,168)			(3,225)
Long-term Debt								(854)
Other Non-Current Liabilities					(6,869)		0	(1,258)			(6,869)
Present Value of Holdback					(1,754)		(869)	(927)	(100)		(2,623)
Total Liabilities Assumed					(10,847)		(1,870)	(10,393)			(12,717)
Business Acquisition Purchase Price Allocation Additional Minimum Pension Liability					987		0				987
Business Acquisition Purchase Price Allocation Equity Acquired					987		0				987
Fair Value Of Previously Held Equity Interest					(4,578)		0				(4,578)
Business Acquisition, Cost of Acquired Entity, Purchase Price, Total				$ 29,116	$ 10,500	$ 10,500	$ 14,518	$ 2,748	$ 647	$ 1,831	$ 25,018