Business Combinations Contingent Consideration (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration Recorded in Income, Liability		$ 4,382		$ (3,865)
Distribution & Storage [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration Recorded in Income, Liability		(168)		444
BioMedical [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Business Acquisition, Contingent Consideration, at Fair Value Beginning Balance			1,990
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration Recorded in Income, Liability	77	4,550	135	(4,309)
Business Acquisition, Contingent Consideration, at Fair Value Ending Balance	2,125		2,125
Maximum [Member] | BioMedical [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Business Acquisition, Contingent Consideration, Potential Cash Payment	$ 3,000		$ 3,000