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Employee Stock Purchase Plan (Tables) | 12 Months Ended
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Mar. 31, 2018
Text Block [Abstract] |
Summary of Employee Stock Purchase Plan | Summarized ESPP information is as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
Employee contributions |  | $ | 458,000 |  |  | $ | 419,000 |  |  | $ | 371,000 |
Shares acquired |  |  | 8,976 |  |  |  | 10,596 |  |  |  | 10,975 |
Average purchase price |  | $ | 49.78 |  |  | $ | 38.80 |  |  | $ | 33.81 |

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- Definition Tabular disclosure of employee stock purchase plan activity. + 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 (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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