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Equity Plans (Tables) | 9 Months Ended
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Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | A summary of compensation costs charged to income, proceeds from the exercise of stock options and similar instruments, and the tax benefit realized from stock options and similar instruments exercised, that were recorded to additional paid-in capital and common stock, by award type, are presented below for the three and nine months ended September 30, 2015 and 2014.
| Three months ended September 30, |  | Nine months ended September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Adjustments to additional paid-in capital and common stock for: |  |  |  |  |  |  |
Compensation costs charged to income: |  |  |  |  |  |  |
ESPP | $ | 82 |  |  | 76 |  |  | $ | 158 |  |  | 148 |
Restricted stock and deferred restricted stock | 365 |  |  | 247 |  |  | 1,050 |  |  | 626 |
Total compensation costs charged to income | $ | 447 |  |  | 323 |  |  | $ | 1,208 |  |  | 774 |
Excess tax benefits realized from share options exercised and stock issuance: |  |  |  |  |  |  |
Stock options | $ | — |  |  | — |  |  | $ | — |  |  | 59 |
Restricted stock and deferred restricted stock | — |  |  | (3 | ) |  | 634 |  |  | 247 |
Total excess tax benefits realized from share options exercised and stock issuance | $ | — |  |  | (3 | ) |  | $ | 634 |  |  | 306 |
Proceeds from the exercise of stock options and similar instruments: |  |  |  |  |  |  |
Stock options | $ | — |  |  | — |  |  | $ | — |  |  | 44 |
DRSPP | — |  |  | — |  |  | — |  |  | 34 |
ESPP | 462 |  |  | 433 |  |  | 895 |  |  | 839 |
Total proceeds from the exercise of stock options and similar instruments | $ | 462 |  |  | 433 |  |  | $ | 895 |  |  | 917 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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