Business Segment Information Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Revenues	$ 336,960	$ 318,639
Operating Income (Loss)	48,302	46,901
OperatingSegmentHealthcare [Member]
Segment Reporting Information [Line Items]
Revenues	229,514	223,224
Operating Income (Loss)	22,730	26,268
OperatingSegmentLifeSciences [Member]
Segment Reporting Information [Line Items]
Revenues	60,496	52,868
Operating Income (Loss)	11,854	9,459
OperatingSegmentIsomedix [Member]
Segment Reporting Information [Line Items]
Revenues	46,056	42,003
Operating Income (Loss)	15,578	12,959
OperatingSegmentAllExceptCorpandOther [Member]
Segment Reporting Information [Line Items]
Revenues	336,066	318,095
Operating Income (Loss)	50,162	48,686
OperatingSegmentCorpandOther [Member]
Segment Reporting Information [Line Items]
Revenues	894	544
Operating Income (Loss)	(1,860)	(1,785)
OperatingSegmentAll [Member]
Segment Reporting Information [Line Items]
Revenues	336,960	318,639
Operating Income (Loss)	$ 48,302	$ 46,901