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v3.8.0.1

Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands | Total | Preferred Shares [Member] | Common Shares [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Treasury Shares [Member]
--- | --- | --- | --- | --- | --- | ---
Shares Outstanding, Beginning Balance at Dec. 31, 2014 |  | 2,000 | 24,512,910 |  |  |
Stockholders' Equity, Beginning Balance at Dec. 31, 2014 | $ 544,295 | $ 48,163 | $ 271 | $ 238,560 | $ 308,539 | $ (51,238)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 51,763 |  |  |  | 51,763 |
Dividends declared to preferred shareholders | (4,875) |  |  |  | (4,875) |
Stock options exercised - shares |  |  | 72,640 |  |  |
Stock options exercised - value | 1,035 |  |  | (408) |  | 1,443
Stock-based compensation expense | 3,942 |  |  | 3,942 |  |
Deferral of executive and director compensation | 406 |  |  | 406 |  |
Executive and director deferred compensation distributions - shares |  |  | 63,494 |  |  |
Executive and director deferred compensation distributions - value | 0 |  |  | (1,261) |  | 1,261
Shares Outstanding, Ending Balance at Dec. 31, 2015 |  | 2,000 | 24,649,044 |  |  |
Stockholders' Equity, Ending Balance at Dec. 31, 2015 | 596,566 | $ 48,163 | $ 271 | 241,239 | 355,427 | (48,534)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 56,609 |  |  |  | 56,609 |
Dividends declared to preferred shareholders | (4,875) |  |  |  | (4,875) |
Reversal of deferred tax asset related to stock options and executive deferred compensation distributions |  |  |  | 269 |  |
Stock options exercised - shares |  |  | 14,600 |  |  |
Stock options exercised - value | 182 |  |  | (108) |  | 290
Stock-based compensation expense | 5,315 |  |  | 5,315 |  |
Deferral of executive and director compensation | 108 |  |  | 108 |  |
Executive and director deferred compensation distributions - shares |  |  | 13,789 |  |  |
Executive and director deferred compensation distributions - value | 0 |  |  | (274) |  | 274
Shares Outstanding, Ending Balance at Dec. 31, 2016 |  | 2,000 | 24,677,433 |  |  |
Stockholders' Equity, Ending Balance at Dec. 31, 2016 | 654,174 | $ 48,163 | $ 271 | 246,549 | 407,161 | (47,970)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 72,081 |  |  |  | 72,081 |
Fair value over carrying value of preferred share redeemed | 0 | $ 2,257 |  |  | (2,257) |
Dividends declared to preferred shareholders | (3,656) |  |  |  | (3,656) |
Common share issuance for conversion of convertible notes - shares |  | 0 | 2,415,903 |  |  |
Common share issuance for conversion of convertible notes - value | 57,500 | $ 0 | $ 24 | 57,476 | 0 | 0
Preferred shares redeemed - shares |  | (2,000) |  |  |  |
Preferred shares redeemed - value | $ (50,420) | $ (50,420) |  |  |  |
Stock options exercised - shares | (678,781) |  | 678,781 |  |  |
Stock options exercised - value | $ 11,225 |  |  | (2,255) |  | 13,480
Stock-based compensation expense | 6,044 |  |  | 6,044 |  |
Deferral of executive and director compensation | 350 |  |  | 350 |  |
Executive and director deferred compensation distributions - shares |  |  | 84,635 |  |  |
Executive and director deferred compensation distributions - value | 0 |  |  | (1,681) |  | 1,681
Shares Outstanding, Ending Balance at Dec. 31, 2017 |  | 0 | 27,856,752 |  |  |
Stockholders' Equity, Ending Balance at Dec. 31, 2017 | $ 747,298 | $ 0 | $ 295 | $ 306,483 | $ 473,329 | $ (32,809)

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