Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

- Definition

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

+ 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
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ 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
-Subparagraph (SX 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

Financing Arrangements - Long-term Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Apr. 10, 2020	Mar. 31, 2020
Debt Instrument
Long-term debt, gross	$ 90,866		$ 86,174
Less: Unamortized Debt Issuance Costs	(253)		(354)
Total Debt, net	90,613		85,820
Parent Company \| Debt - Trust Preferred Securities
Debt Instrument
Long-term debt, gross	12,900
Unsecured Debt \| AirCo 1
Debt Instrument
Long-term debt, gross	7,500		8,335
Unsecured Debt \| Contrail Aviation Inc.
Debt Instrument
Long-term debt, gross	40,470		42,247
Unsecured Debt \| Revolver - MB&T \| AirCo 1
Debt Instrument
Long-term debt, gross	$ 7,500		8,335
Interest rate stated percentage (as a percentage)	6.50%
Unused commitments	$ 0
Unsecured Debt \| Revolver - ONB \| Contrail Aviation Inc.
Debt Instrument
Long-term debt, gross	21,764		21,284
Unused commitments	18,236
Unsecured Debt \| Term Loan A - ONB \| Contrail Aviation Inc.
Debt Instrument
Long-term debt, gross	5,602		6,285
Unsecured Debt \| Term Loan E - ONB \| Contrail Aviation Inc.
Debt Instrument
Long-term debt, gross	5,171		6,320
Unsecured Debt \| Term Loan F - ONB \| Contrail Aviation Inc.
Debt Instrument
Long-term debt, gross	$ 7,933		8,358
Unsecured Debt \| Prime Rate \| Revolver - MB&T \| AirCo 1
Debt Instrument
Basis spread on variable rate	2.00%
Unsecured Debt \| 1-month LIBOR \| Revolver - ONB \| Contrail Aviation Inc.
Debt Instrument
Basis spread on variable rate	3.45%
Unsecured Debt \| 1-month LIBOR \| Term Loan A - ONB \| Contrail Aviation Inc.
Debt Instrument
Basis spread on variable rate	3.75%
Unsecured Debt \| 1-month LIBOR \| Term Loan E - ONB \| Contrail Aviation Inc.
Debt Instrument
Basis spread on variable rate	3.75%
Unsecured Debt \| 1-month LIBOR \| Term Loan F - ONB \| Contrail Aviation Inc.
Debt Instrument
Basis spread on variable rate	3.75%
Unsecured Debt \| Parent Company
Debt Instrument
Long-term debt, gross	$ 42,866		35,592
Unsecured Debt \| Parent Company \| Revolver - MB&T
Debt Instrument
Long-term debt, gross	$ 942		0
Interest rate stated percentage (as a percentage)	2.50%
Unused commitments	$ 16,058
Unsecured Debt \| Parent Company \| Supplemental Revolver- MBT
Debt Instrument
Long-term debt, gross	0		9,550
Unsecured Debt \| Parent Company \| Term Note A - MB&T
Debt Instrument
Long-term debt, gross	7,250		7,750
Unsecured Debt \| Parent Company \| Term Note B - MB&T
Debt Instrument
Long-term debt, gross	$ 3,625		3,875
Interest rate stated percentage (as a percentage)	4.50%
Unsecured Debt \| Parent Company \| Term Note D - MB&T
Debt Instrument
Long-term debt, gross	$ 1,506		1,540
Unsecured Debt \| Parent Company \| Term Note E - MBT
Debt Instrument
Long-term debt, gross	$ 8,451		0
Interest rate stated percentage (as a percentage)	2.50%
Unsecured Debt \| Parent Company \| Debt - Trust Preferred Securities
Debt Instrument
Long-term debt, gross	$ 12,877		12,877
Interest rate stated percentage (as a percentage)	8.00%
Unsecured Debt \| Parent Company \| PPP Loan
Debt Instrument
Long-term debt, gross	$ 8,215		0
Interest rate stated percentage (as a percentage)	1.00%	1.00%
Unsecured Debt \| Parent Company \| Prime Rate \| Revolver - MB&T
Debt Instrument
Basis spread on variable rate	1.00%
Unsecured Debt \| Parent Company \| London Interbank Offered Rate (LIBOR) \| Supplemental Revolver- MBT
Debt Instrument
Interest rate stated percentage (as a percentage)	3.00%
Unsecured Debt \| Parent Company \| London Interbank Offered Rate (LIBOR) \| Term Note E - MBT
Debt Instrument
Basis spread on variable rate	1.50%
Unsecured Debt \| Parent Company \| 1-month LIBOR \| Supplemental Revolver- MBT
Debt Instrument
Basis spread on variable rate	1.25%
Unsecured Debt \| Parent Company \| 1-month LIBOR \| Term Note A - MB&T
Debt Instrument
Basis spread on variable rate	2.00%
Unsecured Debt \| Parent Company \| 1-month LIBOR \| Term Note D - MB&T
Debt Instrument
Basis spread on variable rate	2.00%
Notes Payable to Banks \| Delphax Solutions Debt
Debt Instrument
Long-term debt, gross	$ 30		0
Notes Payable to Banks \| Canadian Emergency Business Account Loan \| Delphax Solutions Debt
Debt Instrument
Long-term debt, gross	$ 30		$ 0
Interest rate stated percentage (as a percentage)	5.00%