CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Statement of Stockholders' Equity [Abstract] | ||
| Cash dividends (in dollars per share) | $ 1.32 | $ 1.26 |
| Net exercise of stock options and related tax benefit, shares | 19,018 | 59,973 |
| Common stock repurchased and returned to unissued status, shares | 22,356 | 63,181 |
| Shares issued for dividend reinvestment plan | 33,124 | |
| Shares issued for employee stock ownership plan, shares | 31,435 | 29,575 |
| Directors deferred compensation plan, shares | 77 | 2,351 |
| Restricted stock activity, shares | 17,504 | 17,195 |
| Shares issued for purchase acquisition, shares | 32,553 | 960 |