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Stock Plans (Tables) | 3 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Summary of Treasury Share Transactions Under the Company's Stock Repurchase Program | The table shown on the next page summarizes treasury share transactions under the Company’s stock repurchase program.
|  | Three months ended June 30, (In thousands) |
|  | 2021 |  |  | 2020 |
|  | Number of Shares |  |  | Amount |  |  | Number of Shares |  |  | Amount |
Treasury shares at the beginning of period |  |  | 4,945 |  |  | $ | (72,343 | ) |  |  | 4,833 |  |  | $ | (71,438 | )
Treasury shares purchased |  |  | 60 |  |  |  | (665 | ) |  |  | 5 |  |  |  | (28 | )
Treasury shares at the end of period |  |  | 5,005 |  |  | $ | (73,008 | ) |  |  | 4,838 |  |  | $ | (71,466 | )

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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