PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
PROPERTY AND EQUIPMENT
Property and equipment, gross	$ 846,254	$ 840,704
Less - accumulated depreciation	(502,422)	(463,649)
Property and equipment, net	343,832	377,055
Depreciation expense	69,213	68,855	65,323
Land
PROPERTY AND EQUIPMENT
Property and equipment, gross	16,264	15,717
Buildings and leasehold improvements
PROPERTY AND EQUIPMENT
Property and equipment, gross	146,407	134,297
Buildings and leasehold improvements | Minimum
PROPERTY AND EQUIPMENT
Estimated Life in years	5 years
Buildings and leasehold improvements | Maximum
PROPERTY AND EQUIPMENT
Estimated Life in years	30 years
Machinery and equipment
PROPERTY AND EQUIPMENT
Property and equipment, gross	614,890	610,770
Machinery and equipment | Minimum
PROPERTY AND EQUIPMENT
Estimated Life in years	3 years
Machinery and equipment | Maximum
PROPERTY AND EQUIPMENT
Estimated Life in years	20 years
Computer equipment and software
PROPERTY AND EQUIPMENT
Property and equipment, gross	54,097	58,182
Computer equipment and software | Minimum
PROPERTY AND EQUIPMENT
Estimated Life in years	2 years
Computer equipment and software | Maximum
PROPERTY AND EQUIPMENT
Estimated Life in years	5 years
Furniture, fixtures and other
PROPERTY AND EQUIPMENT
Property and equipment, gross	$ 14,596	$ 21,738
Furniture, fixtures and other | Minimum
PROPERTY AND EQUIPMENT
Estimated Life in years	2 years
Furniture, fixtures and other | Maximum
PROPERTY AND EQUIPMENT
Estimated Life in years	7 years