RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: Summary of restructuring activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Restructuring charges and adjustments	$ (18)	$ 899	$ 3,545	$ 2,107
Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period			6,708
Restructuring charges and adjustments			3,544
Payments			(4,029)
Restructuring Reserve, at the end of the period	6,223		6,223
Continuing operations | Associate-related reserves
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period			2,400
Restructuring charges and adjustments			1,476
Payments			(2,842)
Restructuring Reserve, at the end of the period	1,034		1,034
Continuing operations | Lease accruals
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period			4,308
Restructuring charges and adjustments			2,068
Payments			(1,187)
Restructuring Reserve, at the end of the period	$ 5,189		$ 5,189