Business Acquisition Acquiree operating results to date since acquisition (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition [Line Items]
Revenues	$ 314,027	$ 245,535	$ 222,407
Net income	16,178	10,389	4,892
MTS-Medication Technologies [Member]
Business Acquisition [Line Items]
Revenues	47,200
Non-acute care solutions [Member]
Business Acquisition [Line Items]
Revenues	53,867
Non-acute care solutions [Member] | MTS-Medication Technologies [Member]
Business Acquisition [Line Items]
Net income	$ 2,900