SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Costs and Expenses	$ 894,950	$ 789,697	$ 2,384,538	$ 2,440,506
Restructuring and Related Cost, Incurred Cost	6,531	14,132	36,289	38,476
Gain (Loss) on Disposition of Business	0	14,350	(20,371)	19,124
Net sales	775,246	844,863	2,302,091	2,612,885
Operating Income (Loss)	(119,704)	55,166	(82,447)	172,379
Interest expense and other	25,836	19,698	72,229	55,721
Income from continuing operations before income taxes	(145,540)	35,468	(154,676)	116,658
Depreciation and amortization	39,320	44,331	119,318	135,080
Asset Impairment Charges	190,227	0	190,227	0
Amortization of Acquired Contract Liabilities	34,492	29,206	91,862	89,031
EBITDA	60,252	84,641	141,031	237,552
Capital expenditures	9,157	9,157	31,932	33,123
Total assets	4,185,932		4,185,932		$ 4,414,600
Revenues	184,182	198,052	529,226	561,177
Corporate Segment [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	2,382	6,231	17,089	15,831
Integrated Systems [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	1,337	95	3,678	474
Net sales	239,198	256,080	711,099	758,803
Operating Income (Loss)	42,667	51,596	132,171	145,379
Depreciation and amortization	8,318	9,766	27,857	30,228
Amortization of Acquired Contract Liabilities	11,634	7,628	28,235	27,101
EBITDA	39,351	53,734	131,793	148,506
Capital expenditures	1,903	2,763	5,923	8,586
Total assets	1,220,259		1,220,259		1,281,828
Aerospace Structures [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	980	2,593	4,484	6,854
Net sales	282,495	304,235	807,754	956,114
Operating Income (Loss)	12,022	23,867	23,253	57,898
Depreciation and amortization	19,048	17,942	57,484	54,289
Amortization of Acquired Contract Liabilities	21,352	21,105	60,315	60,190
EBITDA	9,718	20,704	20,422	51,997
Capital expenditures	2,384	2,228	9,503	9,820
Total assets	1,573,942		1,573,942		1,548,239
Precision Components [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	1,813	4,842	10,259	14,461
Net sales	219,675	226,294	685,701	740,354
Operating Income (Loss)	(186,225)	2,942	(191,100)	7,223
Depreciation and amortization	9,850	13,999	27,858	42,344
Asset Impairment Charges	190,227	0	190,227	0
Amortization of Acquired Contract Liabilities	1,506	473	3,312	1,740
EBITDA	12,346	16,468	23,673	47,827
Capital expenditures	3,407	2,636	12,563	11,040
Total assets	1,056,015		1,056,015		1,262,691
Product Support [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	19	371	779	856
Net sales	68,039	87,292	202,839	257,317
Operating Income (Loss)	12,399	14,662	32,069	42,986
Depreciation and amortization	1,663	2,294	5,068	7,230
EBITDA	14,062	16,956	37,137	50,216
Capital expenditures	599	687	1,629	2,020
Total assets	285,302		285,302		284,231
Elimination of inter-segment sales
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Net sales	(34,161)	(29,038)	(105,302)	(99,703)
Corporate
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Operating Income (Loss)	(567)	(37,901)	(78,840)	(81,107)
Depreciation and amortization	441	330	1,051	989
EBITDA	(15,225)	(23,221)	(71,994)	(60,994)
Capital expenditures	864	843	2,314	1,657
Total assets	50,414		50,414		37,611
Restructuring Charges [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	6,149	11,067	33,751	28,180
Restructuring Charges [Member] | Corporate Segment [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	2,382	6,231	17,089	15,831
Restructuring Charges [Member] | Integrated Systems [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	955	49	1,769	335
Restructuring Charges [Member] | Aerospace Structures [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	980	2,593	4,484	6,854
Restructuring Charges [Member] | Precision Components [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	1,813	1,836	9,630	4,607
Restructuring Charges [Member] | Product Support [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Restructuring and Related Cost, Incurred Cost	19	358	779	553
Guarantor Subsidiaries [Member]
Financial information of reportable segment and the reconciliation of EBITDA to operating income
Costs and Expenses	762,620	685,671	2,040,618	2,153,878
Gain (Loss) on Disposition of Business		0	0
Net sales	705,792	772,916	2,096,894	2,388,881
Operating Income (Loss)	(56,828)	87,245	56,276	235,003
Interest expense and other	2,796	3,963	8,181	8,729
Income from continuing operations before income taxes	(98,501)	39,816	(67,981)	88,365
Depreciation and amortization	34,606	$ 39,850	105,781	121,412
Asset Impairment Charges	135,013
Capital expenditures			25,507	$ 22,442
Total assets	$ 3,497,751		$ 3,497,751		$ 3,700,099