Note 8 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Net income |
$ 12,868
|
$ 4,850
|
$ 37,661
|
$ 16,774
|
| Less: distributed earnings allocated to non-vested stock |
(8)
|
(15)
|
(32)
|
(52)
|
| Less: undistributed earnings allocated to non-vested restricted stock |
(35)
|
(12)
|
(131)
|
(57)
|
| Numerator for basic earnings per share |
12,825
|
4,823
|
37,498
|
16,665
|
| Effect of dilutive securities: |
|
|
|
|
| Add: undistributed earnings allocated to non-vested restricted stock |
35
|
12
|
131
|
57
|
| Less: undistributed earnings reallocated to non-vested restricted stock |
(35)
|
(12)
|
(131)
|
(61)
|
| Numerator for diluted earnings per share |
$ 12,825
|
$ 4,823
|
$ 37,498
|
$ 16,661
|
| Weighted average shares outstanding – basic (in shares) |
43,570,734
|
43,460,449
|
43,524,729
|
43,418,243
|
| Stock options and other awards (in shares) |
2,263
|
837
|
4,694
|
6,180
|
| Weighted average shares outstanding – diluted (in shares) |
43,572,997
|
43,461,286
|
43,529,423
|
43,424,423
|
| Basic earnings per share (in dollars per share) |
$ 0.29
|
$ 0.11
|
$ 0.86
|
$ 0.38
|
| Diluted earnings per share (in dollars per share) |
$ 0.29
|
$ 0.11
|
$ 0.86
|
$ 0.38
|