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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Stock-Based Compensation [Abstract] |
Summary of restricted stock activity |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Shares |  |  | Weighted Average Fair Value |  |  | Shares |  |  | Weighted Average Fair Value |  |  | Shares |  |  | Weighted Average Fair Value |
Nonvested at beginning of year |  |  | 38,650 |  |  | $ | 6.20 |  |  |  | 73,955 |  |  | $ | 11.02 |  |  |  | 91,233 |  |  | $ | 14.98 |
Granted |  |  | 66,100 |  |  |  | 14.30 |  |  |  | 0 |  |  |  | NA |  |  |  | 0 |  |  |  | NA |
Vested |  |  | (38,266 | ) |  |  | 6.20 |  |  |  | (28,533 | ) |  |  | 17.57 |  |  |  | (12,941 | ) |  |  | 37.76 |
Forfeited |  |  | (384 | ) |  |  | 6.20 |  |  |  | (6,772 | ) |  |  | 10.99 |  |  |  | (4,337 | ) |  |  | 14.62 |
Nonvested at end of year |  |  | 66,100 |  |  | $ | 14.30 |  |  |  | 38,650 |  |  | $ | 6.20 |  |  |  | 73,955 |  |  | $ | 11.02 |
Summary of stock option activity |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Shares |  |  | Weighted Average Exercise Price |  |  | Shares |  |  | Weighted Average Exercise Price |
Outstanding at beginning of year |  |  | 214,903 |  |  | $ | 22.40 |  |  |  | 262,042 |  |  | $ | 21.18 |  |  |  | 293,462 |  |  | $ | 20.43 |
Granted |  |  | 0 |  |  |  | NA |  |  |  | 0 |  |  |  | NA |  |  |  | 0 |  |  |  | NA |
Exercised |  |  | (50,930 | ) |  |  | 10.83 |  |  |  | (8,800 | ) |  |  | 6.21 |  |  |  | 0 |  |  |  | NA |
Forfeited or expired |  |  | (11,077 | ) |  |  | 23.77 |  |  |  | (38,339 | ) |  |  | 17.80 |  |  |  | (31,420 | ) |  |  | 14.15 |
Outstanding at end of year |  |  | 152,896 |  |  | $ | 26.15 |  |  |  | 214,903 |  |  | $ | 22.40 |  |  |  | 262,042 |  |  | $ | 21.18 |
Options exercisable at year-end |  |  | 152,896 |  |  | $ | 26.15 |  |  |  | 212,643 |  |  | $ | 22.57 |  |  |  | 250,222 |  |  | $ | 21.86 |
Summary of options outstanding |
|  | Outstanding |  |  | Exercisable |
Range of Exercise Prices |  | Number |  |  | Weighted Average Remaining Contractual Life |  |  | Weighted Average Exercise Price |  |  | Number |  |  | Weighted Average Exercise Price |
$ 6.21 - $ 8.00 |  |  | 20,500 |  |  |  | 2.9 Years |  |  | $ | 6.21 |  |  |  | 20,500 |  |  | $ | 6.21 |
$16.01 - $20.00 |  |  | 37,485 |  |  |  | 1.9 Years |  |  |  | 17.74 |  |  |  | 37,485 |  |  |  | 17.74 |
$24.01 - $28.00 |  |  | 19,916 |  |  |  | 0.8 Years |  |  |  | 26.61 |  |  |  | 19,916 |  |  |  | 26.61 |
$32.01 - $36.00 |  |  | 56,105 |  |  |  | 2.3 Years |  |  |  | 34.75 |  |  |  | 56,105 |  |  |  | 34.75 |
$36.01 - $40.00 |  |  | 14,844 |  |  |  | 0.9 Years |  |  |  | 37.94 |  |  |  | 14,844 |  |  |  | 37.94 |
$40.01 - $44.00 |  |  | 4,046 |  |  |  | 1.8 Years |  |  |  | 40.28 |  |  |  | 4,046 |  |  |  | 40.28 |
Outstanding at year end |  |  | 152,896 |  |  |  | 1.9 Years |  |  | $ | 26.15 |  |  |  | 152,896 |  |  | $ | 26.15 |
Summary of information related to options outstanding |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Minimum exercise price |  | $ | 6.21 |  |  | $ | 6.21 |  |  | $ | 6.21 |
Maximum exercise price |  |  | 40.28 |  |  |  | 40.28 |  |  |  | 40.28 |
Average remaining option term |  |  | 1.9 Years |  |  |  | 2.8 Years |  |  |  | 3.5 Years |
Summary of stock option grants and exercises |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Aggregate intrinsic value of stock options exercised |  | $ | 307,000 |  |  | $ | 26,000 |  |  | $ | NA |
Cash received from stock option exercises |  |  | 228,000 |  |  |  | 55,000 |  |  |  | NA |
Tax benefit realized from stock option exercises |  |  | 0 |  |  |  | 0 |  |  |  | NA |
Weighted average per share fair value of stock options granted |  |  | NA |  |  |  | NA |  |  |  | NA |

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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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