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.

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

Debt (Bilateral Credit Facilities) (Details) - Line of Credit - Bilateral credit facilities - EUR (€)	Dec. 31, 2020	Mar. 31, 2020
Bilateral credit facility expiring in May 2021
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	€ 100,000,000.0
Bilateral Credit Facility Expiring in May 2019 (2) [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		€ 80,000,000