Business Acquisitions - Narrative (Details) (USD $) In Thousands, unless otherwise specified		12 Months Ended		3 Months Ended			3 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012 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, 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, 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] Formulations [Member]	Dec. 31, 2012 NP Coil Dexter [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions			$ 10,500			$ 14,518						$ 29,116
Goodwill			6,773			1,120						3,423
Intangibles			3,556			6,260						17,100
Intangible Assets, Amortizable Life				20 years	5 years		16 years	5 years	5 years	15 years			20 years	5 years	15 years
Percentage of Voting Interests Acquired			60.00%
Post Closing Adjustment											717
Revenues of Acquiree																11,000
Contingent Consideration Paid		2,000
Cash Acquired	$ 258