SEGMENTS (Tables)

9 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Schedule of selected financial information for each reportable segment and the reconciliation of EBITDA to operating income

	Three Months Ended December 31,						Nine Months Ended December 31,
	2019			2018			2019			2018
Net sales:
Integrated Systems	$	275,248		$	252,437		$	813,454		$	754,193
Aerospace Structures	368,972			490,337			1,210,729			1,551,090
Product Support	63,978			71,446			193,127			209,860
Elimination of inter-segment sales	(3,532		)	(6,325		)	(10,303		)	(19,240		)
	$	704,666		$	807,895		$	2,207,007		$	2,495,903
Income (loss) before income taxes:
Operating income (loss):
Integrated Systems	$	47,896		$	39,947		$	134,140		$	115,221
Aerospace Structures	18,039			(49,813		)	43,930			(152,143		)
Product Support	9,538			11,421			29,680			30,604
Corporate	(70,857		)	(15,222		)	(101,296		)	(70,655		)
Share-based compensation expense	(2,955		)	(3,266		)	(8,245		)	(8,509		)
	1,661			(16,933		)	98,209			(85,482		)
Non-service defined benefit income	(13,989		)	(16,520		)	(57,280		)	(49,581		)
Interest expense and other	33,178			29,309			96,069			83,515
	$	(17,528	)	$	(29,722	)	$	59,420		$	(119,416	)
Depreciation and amortization:
Integrated Systems	$	6,992		$	7,376		$	21,042		$	22,316
Aerospace Structures	20,921			27,673			77,265			84,888
Product Support	1,083			1,611			3,272			4,944
Corporate	847			744			2,533			2,201
	$	29,843		$	37,404		$	104,112		$	114,349
Amortization of acquired contract liabilities, net:
Integrated Systems	$	8,377		$	8,172		$	26,126		$	25,789
Aerospace Structures	8,220			6,559			30,027			22,980
	$	16,597		$	14,731		$	56,153		$	48,769
Adjusted EBITDAP:
Integrated Systems	$	46,511		$	39,151		$	129,056		$	111,748
Aerospace Structures	32,140			(28,699		)	88,118			(2,994		)
Product Support	10,621			13,032			32,952			35,548
Corporate and share-based compensation	(16,803		)	(17,744		)	(50,954		)	(59,126		)
	$	72,469		$	5,740		$	199,172		$	85,176
Capital expenditures:
Integrated Systems	$	2,974		$	3,951		$	9,734		$	9,388
Aerospace Structures	5,910			5,722			13,915			22,937
Product Support	955			852			2,621			1,871
Corporate	416			45			980			628
	$	10,255		$	10,570		$	27,250		$	34,824

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	December 31, 2019		March 31, 2019
Total Assets:
Integrated Systems	$	1,277,654	$	1,215,350
Aerospace Structures	1,005,460		1,257,039
Product Support	276,717		271,813
Corporate	65,555		110,372
	$	2,625,386	$	2,854,574