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v3.19.1

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Retained Earnings [Member] |  |
Common dividends declared, per share (in dollars per share) | $ 0.21 | $ 0.66
Treasury Stock [Member] |  |
Common stock options exercised, shares (in shares) | 1,418 | 1,697
Issuance of stock to 401(k) plan, shares (in shares) |  | 4,943
Purchase of treasury shares, shares (in shares) |  | 187,300
Purchase of treasury shares, per share (in dollars per share) |  | $ 28.90
Common dividends declared, per share (in dollars per share) | $ 0.21 | $ 0.66
Issuance of stock to 401(k) plan, shares (in shares) | 4,098 |
Purchase of common shares, shares (in shares) | 232,900 |
Purchase of common shares, per share (in dollars per share) | $ 33.41 |

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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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