Business Segment Information Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 473,244	$ 405,551	$ 1,348,616	$ 1,156,965
Operating Income (Loss)	61,346	55,890	158,937	147,202
OperatingSegmentHealthcare [Member]
Segment Reporting Information [Line Items]
Revenues	353,197	291,831	1,007,176	828,051
Operating Income (Loss)	33,843	31,238	81,752	72,111
OperatingSegmentLifeSciences [Member]
Segment Reporting Information [Line Items]
Revenues	67,997	64,128	185,759	182,425
Operating Income (Loss)	16,402	12,092	41,395	38,672
OperatingSegmentIsomedix [Member]
Segment Reporting Information [Line Items]
Revenues	50,960	49,157	154,003	144,792
Operating Income (Loss)	12,508	14,054	43,098	42,484
OperatingSegmentAllExceptCorpandOther [Member]
Segment Reporting Information [Line Items]
Revenues	472,154	405,116	1,346,938	1,155,268
Operating Income (Loss)	62,753	57,384	166,245	153,267
OperatingSegmentCorpandOther [Member]
Segment Reporting Information [Line Items]
Revenues	1,090	435	1,678	1,697
Operating Income (Loss)	(1,407)	(1,494)	(7,308)	(6,065)
OperatingSegmentAll [Member]
Segment Reporting Information [Line Items]
Revenues	473,244	405,551	1,348,616	1,156,965
Operating Income (Loss)	$ 61,346	$ 55,890	$ 158,937	$ 147,202