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Net Income Per Share | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Net Income Per Share | Net Income Per Share Basic net income per share is computed using the weighted-average number of common shares outstanding for the period. Diluted net income per share is computed by adjusting the weighted-average number of common shares outstanding for the effect of dilutive potential common shares outstanding during the period. Potential common shares included in the diluted calculation consist of incremental shares issuable upon the exercise of outstanding stock options calculated using the treasury stock method. The following table sets forth the calculation of basic and diluted net income per share (in thousands, except per share amounts):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Basic net income per share: |  |  |  |  |  |  |
Net income | $ | 5,200 |  |  | $ | 7,260 |  |  | $ | 10,795 |  |  | $ | 11,008 |
Weighted average common shares | 15,362 |  |  | 15,962 |  |  | 15,362 |  |  | 15,962 |
Basic net income per share | $ | 0.34 |  |  | $ | 0.45 |  |  | $ | 0.70 |  |  | $ | 0.69 |
Diluted net income per share: |  |  |  |  |  |  |
Net income | $ | 5,200 |  |  | $ | 7,260 |  |  | $ | 10,795 |  |  | $ | 11,008 |
Weighted average common shares | 15,362 |  |  | 15,962 |  |  | 15,362 |  |  | 15,962 |
Effect of dilutive securities: stock options | 95 |  |  | 44 |  |  | 65 |  |  | 50 |
Diluted weighted average common shares | 15,457 |  |  | 16,006 |  |  | 15,427 |  |  | 16,012 |
Diluted net income per share | $ | 0.34 |  |  | $ | 0.45 |  |  | $ | 0.70 |  |  | $ | 0.69 |
For the three and six months ended June 30, 2013 and 2012, options to purchase 100,000 shares of common stock were not included in the computation of diluted net income per share because the effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -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 Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 + Details
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