Revenues from External Customers (Detail) (USD $) In Thousands	3 Months Ended
	Jul. 02, 2011	Jul. 03, 2010
Segment Reporting Information [Line Items]
Net revenues	$ 170,569	$ 163,039
Plasma Disposables
Segment Reporting Information [Line Items]
Net revenues	62,759	55,917
Blood Bank Disposables
Segment Reporting Information [Line Items]
Net revenues	49,178	47,631
Blood Bank Disposables | Platelet
Segment Reporting Information [Line Items]
Net revenues	37,310	36,317
Blood Bank Disposables | Red Cell
Segment Reporting Information [Line Items]
Net revenues	11,869	11,314
Hospital Disposables
Segment Reporting Information [Line Items]
Net revenues	29,111	30,016
Hospital Disposables | Surgical
Segment Reporting Information [Line Items]
Net revenues	15,742	16,351
Hospital Disposables | OrthoPAT
Segment Reporting Information [Line Items]
Net revenues	7,754	8,957
Hospital Disposables | Diagnostics
Segment Reporting Information [Line Items]
Net revenues	5,615	4,708
Operating Segments
Segment Reporting Information [Line Items]
Net revenues	141,048	133,564
Software Solutions
Segment Reporting Information [Line Items]
Net revenues	18,160	16,460
Equipment and Other Related
Segment Reporting Information [Line Items]
Net revenues	$ 11,361	$ 13,015