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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Common Stock [Member] | Capital Surplus [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss), Net of Tax | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2010 | $ 76,673 | $ 154,615 | $ 103,439 | $ 3,911 | $ 338,638
Balance (in shares) at Dec. 31, 2010 | 15,334,410 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll forward] |  |  |  |  |
Net income |  |  | 38,827 |  | 38,827
Net change in unrealized gain/loss on securities available-for-sale, net of tax |  |  |  | 6,272 | 6,272
Cash dividends declared |  |  | (18,835) |  | (18,835)
Issuance of common stock (in shares) | 50,256 |  |  |  |
Issuance of common stock | 251 | 1,040 |  |  | 1,291
Issuance of restricted stock (shares) | 45,542 |  |  |  |
Issuance of restricted stock | 228 | (228) |  |  | 0
Forfeiture of restricted stock (shares) | (216) |  |  |  |
Forfeiture of restricted stock | (1) | 1 |  |  | 0
Stock-based compensation and related excess tax benefits |  | 673 |  |  | 673
Balance at Dec. 31, 2011 | 77,151 | 156,101 | 123,431 | 10,183 | 366,866
Balance (in shares) at Dec. 31, 2011 | 15,429,992 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll forward] |  |  |  |  |
Net income |  |  | 44,862 |  | 44,862
Net change in unrealized gain/loss on securities available-for-sale, net of tax |  |  |  | 2,482 | 2,482
Cash dividends declared |  |  | (19,349) |  | (19,349)
Issuance of common stock (in shares) | 182,612 |  |  |  |
Issuance of common stock | 912 | 3,483 |  |  | 4,395
Issuance of restricted stock (shares) | 331 |  |  |  |
Issuance of restricted stock | 2 | (2) |  |  | 0
Stock-based compensation and related excess tax benefits |  | 1,088 |  |  | 1,088
Balance at Dec. 31, 2012 | 78,065 | 160,670 | 148,944 | 12,665 | 400,344
Balance (in shares) at Dec. 31, 2012 | 15,612,935 |  |  |  | 15,612,935
Increase (Decrease) in Stockholders' Equity [Roll forward] |  |  |  |  |
Net income |  |  | 45,172 |  | 45,172
Net change in unrealized gain/loss on securities available-for-sale, net of tax |  |  |  | (20,691) | (20,691)
Cash dividends declared |  |  | (19,827) |  | (19,827)
Issuance of common stock (in shares) | 207,506 |  |  |  |
Issuance of common stock | 1,038 | 5,310 |  |  | 6,348
Issuance of restricted stock (shares) | 863 |  |  |  |
Issuance of restricted stock | 4 | (4) |  |  | 0
Stock-based compensation and related excess tax benefits |  | 1,146 |  |  | 1,146
Balance at Dec. 31, 2013 | $ 79,107 | $ 167,122 | $ 174,289 | $ (8,026) | $ 412,492
Balance (in shares) at Dec. 31, 2013 | 15,821,304 |  |  |  | 15,821,304

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