Revenue Recognition and Contracts with Customers - Schedule of Disaggregated Net Sales by End Market (Excluding Intercompany Sales) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Amortization of acquired contract liabilities	$ 938	$ 6,867	$ 3,645	$ 35,017
Net sales	319,249	425,994	1,073,291	1,402,886
Systems & Support [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	235,343	259,332	739,811	743,721
Amortization of acquired contract liabilities	938	4,306	3,633	11,569
Revenues excluding intercompany sales	236,281	263,638	743,444	755,290
Systems & Support [Member] | Commercial Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	99,762	92,529	290,347	280,102
Systems & Support [Member] | Military [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	113,343	145,168	375,671	396,672
Systems & Support [Member] | Business Jets [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	11,148	7,802	34,026	26,884
Systems & Support [Member] | Regional [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	5,706	5,231	16,294	18,218
Systems & Support [Member] | Non-aviation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	5,384	8,602	23,473	21,845
Aerospace Structures [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	82,968	159,795	329,835	624,148
Amortization of acquired contract liabilities	0	2,561	12	23,448
Revenues excluding intercompany sales	82,968	162,356	329,847	647,596
Aerospace Structures [Member] | Commercial Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	75,624	109,929	288,153	372,249
Aerospace Structures [Member] | Military [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	454	31,670	15,367	105,365
Aerospace Structures [Member] | Business Jets [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	5,078	18,039	21,588	138,141
Aerospace Structures [Member] | Regional [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	1,544	0	4,441	8,025
Aerospace Structures [Member] | Non-aviation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	$ 268	$ 157	$ 286	$ 368