RESTRUCTURING (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 617	$ (694)	$ 2,929	$ (1,019)
Turnaround costs	7,181	2,448	10,653	8,240
Total restructuring and turnaround costs	7,798	1,754	13,582	7,221
Blood Center
Restructuring Cost and Reserve [Line Items]
Restructuring costs	18	6	154	51
Turnaround costs	293	182	293	182
Hospital
Restructuring Cost and Reserve [Line Items]
Restructuring costs	58	132	295	(91)
Turnaround costs	0	(68)	0	(207)
Plasma
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4	47	552	(36)
Turnaround costs	108	80	187	123
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs	537	(879)	1,928	(943)
Turnaround costs	6,780	2,254	10,173	8,142
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring costs	476	(750)	1,777	(1,131)
Research and development
Restructuring Cost and Reserve [Line Items]
Restructuring costs	139	56	708	112
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2	$ 0	$ 444	$ 0