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Impact of Recent Accounting Standards Not Yet Adopted Impact of Recent Accounting Standards Not Yet Adopted (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Mar. 31, 2017
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Available-for-sale, Gross Unrealized Losses |  | $ 1,737 | $ 1,940
Other investments |  |  |
Available-for-sale, Gross Unrealized Losses | [1] | $ 496 | $ 496
[1] | (1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency-backed securities.

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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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