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Stock Compensation (Details) (USD $) | 0 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 02, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Stock compensation |  |  |  |  |
Grant of options to purchase (in shares) |  | 547,492 |  |  |
Options issued in 2008 to acquire shares that vested immediately |  | 11,578 |  |  |
Number of shares |  |  |  |  |
Outstanding, beginning of year (in shares) |  | 223,951 | 286,977 | 287,186 |
Expired (in shares) |  | (102,546) | (63,026) | (209) |
Outstanding, end of year (in shares) |  | 121,405 | 223,951 | 286,977 | 287,186
Exercisable, end of year (in shares) |  | 106,888 | 205,616 | 258,206 |
Weighted average exercise price |  |  |  |  |
Outstanding, beginning of year (in dollars per share) |  | $ 23.74 | $ 22.46 | $ 22.46 |
Expired (in dollars per share) |  | $ 23.26 | $ 17.94 | $ 17.27 |
Outstanding, end of year (in dollars per share) |  | $ 24.14 | $ 23.74 | $ 22.46 | $ 22.46
Exercisable, end of year (in dollars per share) |  | $ 24.43 | $ 23.81 | $ 22.53 |
Additional disclosures |  |  |  |  |
Stock dividend (as a percent) | 4.00% |  |  |  |
Weighted average remaining contractual life of options outstanding |  | 2 years 6 months | 3 years |  |
Intrinsic value of options outstanding |  | $ 0 | $ 0 |  |
Weighted average remaining contractual life of options exercisable |  | 2 years 3 months 18 days | 2 years 9 months 18 days |  |
Intrinsic value of options exercisable |  | 0 | 0 |  |
Stock based compensation expense |  | 19,000 |  | 29,000 | 58,000
Total unrecognized compensation expense related to non-vested stock awards |  | $ 50,000 |  |  |
Weighted average period is expected to be recognized |  | 1 year 8 months 12 days |  |  |
Minimum |  |  |  |  |
Stock compensation |  |  |  |  |
Options vest over periods |  | 4 years |  |  |
Maximum |  |  |  |  |
Stock compensation |  |  |  |  |
Options vest over periods |  | 5 years |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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