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Common Shares (Tables)

12 Months Ended

Mar. 31, 2019

Notes To Financial Statements [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

Years ended March 31,		2019			2018			2017
Denominator (shares in thousands):
Weighted average shares outstanding—basic		84,577			85,028			85,473
Dilutive effect of share equivalents		891			685			621
Weighted average shares outstanding and share equivalents—diluted		85,468			85,713			86,094

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Options to purchase the following number of shares were outstanding but excluded from the computation of diluted earnings per share because the combined exercise prices, unamortized fair values, and assumed tax benefits upon exercise were greater than the average market price for the shares during the periods, so including these options would be anti-dilutive:

Years ended March 31,		2019			2018			2017
Number of ordinary share options (shares in thousands)		352			393			576

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- Definition

Notes to Financial Statements [Abstract]

+ References

No definition available.

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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