Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($)
|
Total |
Common Stock |
Additional Paid-In Capital |
Treasury Stock |
Retained Earnings |
| Balance at beginning of period (in shares) at Dec. 31, 2015 |
|
29,765,525
|
|
|
|
| Balance at beginning of period at Dec. 31, 2015 |
$ 395,249,574
|
$ 2,979
|
$ 319,002,254
|
$ (784,829)
|
$ 77,029,170
|
| Treasury stock at beginning of period (in shares) at Dec. 31, 2015 |
(37,937)
|
|
|
(37,937)
|
|
| Increase (decrease) in stockholders' equity: |
|
|
|
|
|
| Share compensation expense |
$ 11,158,738
|
|
11,158,738
|
|
|
| Exercise of stock options (in shares) |
|
132,968
|
|
|
|
| Exercise of stock options |
754,739
|
$ 13
|
754,726
|
|
|
| Common stock issued for vested restricted stock (in shares) |
|
618,154
|
|
|
|
| Common stock issued for vested restricted stock |
0
|
$ 62
|
(62)
|
|
|
| Common stock issued for vested performance shares (in shares) |
|
37,547
|
|
|
|
| Common stock issued for vested performance shares |
0
|
$ 4
|
(4)
|
|
|
| Common shares withheld and retired to satisfy employee tax withholding obligations upon vesting of share-based awards (in shares) |
|
(202,715)
|
|
|
|
| Common shares withheld and retired to satisfy employee tax withholding obligations upon vesting of share-based awards |
(4,679,014)
|
$ (20)
|
(4,678,994)
|
|
|
| Tax deficiency from exercise of stock options |
(231,521)
|
|
(231,521)
|
|
|
| Purchases of treasury stock (in shares) |
|
|
|
(1,678,345)
|
|
| Purchases of treasury stock |
(35,686,243)
|
|
|
$ (35,686,243)
|
|
| Net income |
4,555,430
|
|
|
|
4,555,430
|
| Balance at end of period (in shares) at Sep. 30, 2016 |
|
30,351,479
|
|
|
|
| Balance at end of period at Sep. 30, 2016 |
$ 371,121,703
|
$ 3,038
|
$ 326,005,137
|
$ (36,471,072)
|
$ 81,584,600
|
| Treasury stock at end of period (in shares) at Sep. 30, 2016 |
(1,716,282)
|
|
|
(1,716,282)
|
|