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Capital Stock (Share Appreciation Rights) (Details) - Share Appreciation Rights (SARs) - $ / shares | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Number of Shares |  |
Outstanding, beginning balance (in shares) | 0 | 0
Granted (in shares) | 836,775 |
Exercised (in shares) | 0 | 0
Outstanding, ending balance (in shares) | 836,775 | 0
Weighted-Average Exercise Price |  |
Outstanding, beginning balance (in dollars per share) | $ 0.00 | $ 0.00
Granted (in dollars per share) | 25.29 |
Exercised (in dollars per share) | 0.00 | 0.00
Outstanding, ending balance (in dollars per share) | 25.29 | 0.00
Weighted Average Grant Date Fair Value |  |
Outstanding, beginning balance (in dollars per share) | 0.00 | 0.00
Granted (in dollars per share) | 8.54 |
Exercised (in dollars per share) | 0.00 | 0.00
Outstanding, ending balance (in dollars per share) | $ 8.54 | $ 0.00

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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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