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Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) (USD $) In Thousands | Outstanding Common Shares Repurchased [Member] Treasury Stock [Member] | Shares Repurchased To Fund Options Exercised [Member] Treasury Stock [Member] | Shares Repurchased To Satisfy Tax Obligations [Member] Treasury Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2012 |  |  |  | $ 315 | $ 198,314 | $ (10,257) | $ 241,856 | $ 12,137 |
Change in net unrealized gains (losses) on securities available for sale, net of taxes of approximately ($7,484) and $15,482 for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | (19,947) | (19,947)
Amortization of actuarial losses, net of taxes of approximately ($266) and ($405) for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | 522 | (522)
Amortization of prior service credits, net of taxes of approximately $18 and $15 for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | (19) | 19
OTTI charges included in income, net of taxes of approximately ($620) for the nine months ended September 30, 2013 |  |  |  |  |  |  |  | 799 | (799)
Reclassification adjustment for gains included in net income, net of tax of approximately $2,238 and $1,299 for the nine months ended September 30, 2014 and 2013, respectively. |  |  |  |  |  |  |  | (1,673) | (1,673)
Net income |  |  |  |  |  |  | 25,804 |  | 25,804
Cash dividends declared and paid on common shares ($0.45 and $0.39 per common share for the nine months ended September 30, 2014 and 2013, respectively) |  |  |  |  |  |  | (11,747) |  |
Repurchase of outstanding shares | (13,152) | (4,075) | (912) |  |  |  |  |  |
Award of common shares released from Employee Benefit Trust (133,446 and 141,059 common shares for the nine months ended September 30, 2014 and 2013, respectively) |  |  |  |  | 1,608 |  |  |  |
Shares issued upon vesting of restricted stock unit awards |  |  |  |  | 161 | 2,338 | (100) |  |
Issuance upon exercise of stock options |  |  |  |  | 849 | 4,262 | (126) |  | 4,074
Stock-based compensation activity, net |  |  |  |  | (284) |  |  |  |
Stock-based income tax benefit |  |  |  |  | 339 |  |  |  |
Balance, end of period at Sep. 30, 2013 |  |  |  | 315 | 200,987 | (21,796) | 255,687 | (8,181) | 427,012
Balance, beginning of period at Dec. 31, 2013 |  |  |  | 315 | 201,902 | (22,053) | 263,743 | (11,375) | 432,532
Change in net unrealized gains (losses) on securities available for sale, net of taxes of approximately ($7,484) and $15,482 for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | 9,667 | 9,667
Amortization of actuarial losses, net of taxes of approximately ($266) and ($405) for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | 259 | (259)
Amortization of prior service credits, net of taxes of approximately $18 and $15 for the nine months ended September 30, 2014 and 2013, respectively |  |  |  |  |  |  |  | (16) | 16
Reclassification adjustment for gains included in net income, net of tax of approximately $2,238 and $1,299 for the nine months ended September 30, 2014 and 2013, respectively. |  |  |  |  |  |  |  | (2,978) | (2,978)
Net income |  |  |  |  |  |  | 33,182 |  | 33,182
Cash dividends declared and paid on common shares ($0.45 and $0.39 per common share for the nine months ended September 30, 2014 and 2013, respectively) |  |  |  |  |  |  | (13,461) |  |
Repurchase of outstanding shares | (12,660) | (1,290) | (1,145) |  |  |  |  |  |
Award of common shares released from Employee Benefit Trust (133,446 and 141,059 common shares for the nine months ended September 30, 2014 and 2013, respectively) |  |  |  |  | 2,029 |  |  |  |
Shares issued upon vesting of restricted stock unit awards |  |  |  |  | 30 | 3,137 | (405) |  |
Issuance upon exercise of stock options |  |  |  |  | 310 | 1,697 | (50) |  | 1,290
Stock-based compensation activity, net |  |  |  |  | 801 |  |  |  |
Stock-based income tax benefit |  |  |  |  | 757 |  |  |  |
Balance, end of period at Sep. 30, 2014 |  |  |  | $ 315 | $ 205,829 | $ (32,314) | $ 283,009 | $ (4,443) | $ 452,396

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