CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Cash dividends per share | $ 0.60 | $ 0.60 | $ 0.60 |
| Retained earnings (deficit) | |||
| Cash dividends per share | $ 0.60 | $ 0.60 | $ 0.60 |