Debt instrument available amount in asset sale covenants.

No definition available.

Name:	tgi_DebtInstrumentAvailableAmountInAssetSaleCovenants
Namespace Prefix:	tgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument, covenant, maximum principal amount outstanding.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Debt instrument, covenant, repayment premium percentage.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Debt instrument interest payment terms.

+ References

No definition available.

+ Details

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- Definition

This represents the percentage of the outstanding notes that may be redeemed using the proceeds of an equity offering occurring prior to September 15, 2020.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt must be offered to be redeemed by the issuer upon a change in control.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer upon the occurrence of an equity offering prior to September 15, 2020.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The proceeds received as a percentage of the original principal amount of the debt instrument.

+ References

No definition available.

+ Details

Name:	tgi_ProceedsFromDebtInstrumentPercentageOfOriginalPrincipal
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Receivables securitization facility expiration month and year.

+ References

No definition available.

+ Details

Name:	tgi_ReceivablesSecuritizationFacilityExpirationMonthAndYear
Namespace Prefix:	tgi_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
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-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-SubTopic 30
-Section 55
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-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for loan and debt issuance costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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- Details

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Long-term Debt - Additional Information (Details) - USD ($)						6 Months Ended
	Aug. 17, 2020	Oct. 23, 2019	Sep. 23, 2019	Aug. 17, 2017	Jun. 03, 2014	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Debt Instrument [Line Items]
Payments of financing costs						$ 17,342,000	$ 16,275,000
Interest paid, including capitalized interest, operating and investing activities						52,806,000	$ 48,972,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Payment of line of credit facility	$ 335,240,000
Long-term debt								$ 400,000,000
Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						75,000,000
Long-term debt						0		75,000,000
Letters of credit outstanding, amount						$ 27,741,000
Receivables securitization facility, expiration period						2022-12
Receivable Securitization Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	2.50%
Line of credit facility, unused capacity, commitment fee percentage	0.60%
Receivable Securitization Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 50,000,000
Receivable Securitization Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	0.75%
Senior Secured First Lien Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	8.875%
Long-term debt						$ 700,000,000
Debt instrument, principal amount	$ 700,000,000
Proceeds from loan, percentage of principal (as a percent)	100.00%
Debt instrument, interest rate, effective percentage	8.875%
Debt instrument, interest payment terms						Interest is payable semi-annually in cash in arrears on June 1 and December 1 of each year, commencing on December 1, 2020
Debt instrument, interest payment commencing date	Dec. 01, 2020
Payments of financing costs	$ 11,600,000
Debt instrument, redemption price, percentage	100.00%
Debt instrument, redemption, description	40.00%
Debt instrument, redemption price, percentage - equity offering	108.875%
Debt instrument, redemption price, percentage - change of control	101.00%
Debt instrument repayment premium percentage	106.656%
Aggregate principal amount of Notes outstanding	$ 350,000,000
Available amount in asset sale covenants	$ 100,000,000
Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			6.25%
Long-term debt						$ 525,000,000		525,000,000
Debt instrument, principal amount			$ 525,000,000
Proceeds from loan, percentage of principal (as a percent)			100.00%
Debt instrument, interest rate, effective percentage			6.25%
Debt instrument, interest payment terms						Interest on the 2024 Notes is payable semiannually in cash in arrears on March 15 and September 15 of each year. The 2024 Notes are secured by second-priority liens on all of the Company's and the Guarantor Subsidiaries' assets that secure all of the indebtedness under the Credit Facility and certain hedging and cash management obligations.
Debt instrument, due date			Sep. 15, 2024
Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		4.875%
Debt instrument principal amount redeemed		$ 375,000,000
Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					5.25%
Long-term debt						$ 300,000,000		300,000,000
Debt instrument, principal amount					$ 300,000,000
Proceeds from loan, percentage of principal (as a percent)					100.00%
Debt instrument, interest rate, effective percentage					5.25%
Debt instrument, interest payment terms						Interest on the 2022 Notes accrues at the rate of 5.250% per annum and is payable semiannually in cash in arrears on June 1 and December 1 of each year.
Debt instrument, due date					Jun. 01, 2022
Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				7.75%
Long-term debt						$ 500,000,000		$ 500,000,000
Debt instrument, principal amount				$ 500,000,000
Proceeds from loan, percentage of principal (as a percent)				100.00%
Debt instrument, interest payment terms						Interest on the 2025 Notes accrues at the rate of 7.750% per annum and is payable semiannually in cash in arrears on February 15 and August 15 of each year.
Debt instrument, due date				Aug. 15, 2025