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NET INCOME PER COMMON SHARE | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
NET INCOME PER COMMON SHARE | (8) NET INCOME PER COMMON SHARE Basic and diluted net income per common share are calculated as follows:
|  | Income (Numerator) |  |  | Shares (Denominator) |  |  | Per Share Amount |
|  | (Dollars in thousands, except per share data) |
Three Months Ended June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 12,593 |  |  |  | 15,232,129 |  |  | $ | 0.83 |
Effect of stock options |  |  | — |  |  |  | 247,620 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 12,593 |  |  |  | 15,479,749 |  |  | $ | 0.81 |
Three Months Ended June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 11,729 |  |  |  | 15,155,525 |  |  | $ | 0.77 |
Effect of stock options |  |  | — |  |  |  | 271,271 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 11,729 |  |  |  | 15,426,796 |  |  | $ | 0.76 |
Six Months Ended June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 25,965 |  |  |  | 15,235,397 |  |  | $ | 1.70 |
Effect of stock options |  |  | — |  |  |  | 246,473 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 25,965 |  |  |  | 15,481,870 |  |  | $ | 1.68 |
Six Months Ended June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 25,734 |  |  |  | 15,145,066 |  |  | $ | 1.70 |
Effect of stock options |  |  | — |  |  |  | 276,608 |  |  |  |  |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders plus assumed exercises of stock options |  | $ | 25,734 |  |  |  | 15,421,674 |  |  | $ | 1.67 |
The following table shows the number and average exercise price of options that were excluded from the computation of diluted net income per common share for each period because the options’ exercise prices were greater than the average market price of the common shares:
|  | Shares |  |  | Average Exercise Price |
Three Months Ended June 30, 2013 |  |  | 466,159 |  |  | $ | 39.76 |
Three Months Ended June 30, 2012 |  |  | 607,200 |  |  | $ | 38.70 |
Six Months Ended June 30, 2013 |  |  | 475,867 |  |  | $ | 39.69 |
Six Months Ended June 30, 2012 |  |  | 607,200 |  |  | $ | 38.70 |

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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 Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: 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 4: 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=32703322&loc=d3e4984-109258 Reference 5: 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=26872669&loc=d3e20235-122688 + Details
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