SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Changes in Accounting Estimates (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Change in Accounting Estimate [Line Items]
Share-based Compensation	$ 1,432	$ 1,692	$ 3,695	$ 4,854
Amortization of Acquired Contract Liabilities	14,258	6,219	34,373	19,774
Comprehensive Income [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate	(21,339)	(5,492)	(36,961)	(8,049)
Income, net [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate	(13,816)	(3,513)	(24,342)	(5,075)
Diluted earings per share [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate	0	0	0	0
Gross Favorable Change in Estimates [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate	2,343		11,206
Gross Unfavorable Changes In Estimates [Member]
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate	(23,682)		(48,167)
Aerospace Systems [Member]
Change in Accounting Estimate [Line Items]
Amortization of Acquired Contract Liabilities	5,878		14,238
Aerostructures Group [Member]
Change in Accounting Estimate [Line Items]
Amortization of Acquired Contract Liabilities	$ 8,380	$ 6,219	$ 20,135	$ 19,774