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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2012
Employee Benefit Plans [Abstract] |
Activity of restricted stock awards |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Beginning of period |  |  | 29,715 |  |  |  | 28,925 |  |  |  | 27,775 |
Granted |  |  | 11,000 |  |  |  | 11,000 |  |  |  | 10,150 |
Vested |  |  | (8,910 | ) |  |  | (9,432 | ) |  |  | (7,425 | )
Forfeited |  |  | (1,135 | ) |  |  | (778 | ) |  |  | (1,575 | )
Nonvested, end of period |  |  | 30,670 |  |  |  | 29,715 |  |  |  | 28,925 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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