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v3.8.0.1

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | COMMON STOCK [Member] | CAPITAL SURPLUS [Member] | RETAINED EARNINGS [Member] | ACCUMULATED OTHER COMPREHENSIVE INCOME [Member]
--- | --- | --- | --- | --- | ---
Balance at beginning of period, Shares at Dec. 31, 2014 |  | 31,009,026 |  |  |
Balance at beginning of period at Dec. 31, 2014 |  | $ 31,008 | $ 81,337 | $ 492,776 | $ 4,193
Shares issued, Shares |  | 242,760 |  |  |
Shares issued, Value |  | $ 242 | 3,023 |  |
Net income | $ 66,170 |  |  | 66,170 |
Net change | $ (2,666) |  |  |  | (2,666)
Tax effect of stock options |  |  | 1,191 |  |
Dividends on common stock |  |  |  | (21,799) |
Stock-based compensation arrangements |  |  | 1,717 |  |
Shares acquired and canceled, Shares |  | (56,894) |  |  |
Shares acquired and canceled, Value |  | $ (56) |  | (1,626) |
Balance at end of period, Shares at Dec. 31, 2015 | 31,194,892 | 31,194,892 |  |  |
Balance at end of period at Dec. 31, 2015 | $ 655,510 | $ 31,194 | 87,268 | 535,521 | 1,527
Shares issued, Shares |  | 626,978 |  |  |
Shares issued, Value |  | $ 628 | 9,305 |  |
Net income | 70,674 |  |  | 70,674 |
Net change | $ (1,433) |  |  |  | (1,433)
Tax effect of stock options |  |  | 3,521 |  |
Dividends on common stock |  |  |  | (23,124) |
Stock-based compensation arrangements |  |  | 1,636 |  |
Shares acquired and canceled, Shares |  | (200,000) |  |  |
Shares acquired and canceled, Value |  | $ (200) |  | (5,423) |
Balance at end of period, Shares at Dec. 31, 2016 | 31,621,870 | 31,621,870 |  |  |
Balance at end of period at Dec. 31, 2016 | $ 711,094 | $ 31,622 | 101,730 | 577,648 | 94
Shares issued, Shares |  | 272,693 |  |  |
Shares issued, Value |  | $ 273 | 4,571 |  |
Net income | 86,439 |  |  | 86,439 |
Net change | $ (2,421) |  |  |  | (2,421)
Dividends on common stock |  |  |  | (25,507) |
Stock-based compensation arrangements |  |  | 1,180 |  |
Balance at end of period, Shares at Dec. 31, 2017 | 31,894,563 | 31,894,563 |  |  |
Balance at end of period at Dec. 31, 2017 | $ 775,629 | $ 31,895 | $ 107,481 | $ 638,580 | $ (2,327)

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