Guarantees - Summary (Details) - USD ($) $ in Thousands	6 Months Ended
Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Guarantees [Abstract]
Amounts guaranteed (not to exceed)	$ 120,269	$ 143,298	$ 168,709
Amounts outstanding under guarantee	48,863	103,846	61,904
Fair value of guarantees	1,026	3,714	1,861
Amounts due to local banks on behalf of suppliers and included in accounts payable	$ 0	$ 18,659	$ 0
Number of years before expiring guarantees	1 year

Guarantor Obligations, Amounts due to Local Banks on Behalf of Suppliers and included in Accounts Payable

No definition available.

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- Definition

Guarantor Obligations, Fair Value

+ References

No definition available.

+ Details

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- Definition

Number of Years, Before Expiring Guarantees

+ References

No definition available.

+ Details

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248

+ Details

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Period Type:	instant

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248

+ Details

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- References

No definition available.

+ Details

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