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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Option Activity | A summary of option activity under our 1998 Stock Option plan for the six months ended June 30, 2013 is presented below.
| Number of Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2012 | 394,322 |  |  | $ | 15.30 |  |  |  |  |  |
Granted | 47,000 |  |  | 18.75 |  |  |  |  |  |
Exercised | (25,887 | ) |  | 14.23 |  |  |  |  |  |
Canceled/Forfeited | (3,833 | ) |  | 17.01 |  |  |  |  |  |
Expired | — |  |  | — |  |  |  |  |  |
Outstanding, June 30, 2013 | 411,602 |  |  | $ | 15.75 |  |  | 5.80 |  | $ | 3,187 |
Exercisable, June 30, 2013 | 342,520 |  |  | $ | 15.32 |  |  | 5.11 |  | $ | 2,800 |
Summary of Stock Options Outstanding | The following table summarizes information about our stock options outstanding at June 30, 2013:
Range of Exercise Prices |  | Options Outstanding |  | Options Exercisable
| Shares |  | Weighted Average Remaining Contractual Life (years) |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Exercise Price
$0.01-9.43 |  | 71,352 |  |  | 3.47 |  | $ | 8.72 |  |  | 71,352 |  |  | $ | 8.72 |
$9.44-15.60 |  | 77,000 |  |  | 5.58 |  | 12.77 |  |  | 64,334 |  |  | 12.35 |
$15.61-20.48 |  | 263,250 |  |  | 6.50 |  | 18.52 |  |  | 206,834 |  |  | 18.51 |
$0.01-20.48 |  | 411,602 |  |  | 5.80 |  | $ | 15.75 |  |  | 342,520 |  |  | $ | 15.32 |
Status of Unvested Stock Options | The summary of the status of our unvested stock options as of December 31, 2012 and changes during the six months ended June 30, 2013 is presented below.
Unvested stock options: | Shares |  | Weighted Average Grant Date Fair Value
Unvested at December 31, 2012 | 49,334 |  |  | $ | 9.01 |
Granted | 47,000 |  |  | 10.30 |
Vested | (26,335 | ) |  | 9.05 |
Canceled/Forfeited | (917 | ) |  | 8.74 |
Unvested at June 30, 2013 | 69,082 |  |  | $ | 9.88 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired 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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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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