CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Statement of Stockholders' Equity [Abstract] | ||||
| Cash dividends (in dollars per share) | $ 0.50 | $ 0.48 | $ 1.00 | $ 0.96 |
| Net exercise of stock options and related tax benefit (in shares) | 7,303 | 3,173 | 12,299 | 4,843 |
| Common stock repurchased and returned to unissued status (in shares) | 155,093 | 15,500 | ||
| Shares issued for employee stock ownership plan (in shares) | 38,883 | |||
| Directors deferred compensation plan (in shares) | 2,027 | 1,967 | 2,443 | 2,251 |
| Restricted stock activity (in shares) | 5,569 | 10,078 | 8,864 | 15,410 |