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Earnings Per Common Share | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Earnings Per Common Share | Earnings Per Common Share Basic net earnings per share are computed using the weighted-average number of common shares outstanding. The dilutive effect of potential common shares outstanding is included in diluted net earnings per share. The computations of basic net earnings per share and diluted net earnings per share for 2013, 2012 and 2011 are as follows:
|  | Year ended December 31, 2013
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 47,129,000 |  |  |  |  |
| Basic earnings per common share | $ | 47,129,000 |  |  | 69,206,000 |  |  | $ | 0.68 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 839,000 |  |  | (0.01 | )
| Diluted earnings per common share | $ | 47,129,000 |  |  | 70,045,000 |  |  | $ | 0.67 |
|  | Year ended December 31, 2012
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 44,214,000 |  |  |  |  |
| Basic earnings per common share | $ | 44,214,000 |  |  | 67,511,000 |  |  | $ | 0.65 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 974,000 |  |  | — |
| Diluted earnings per common share | $ | 44,214,000 |  |  | 68,485,000 |  |  | $ | 0.65 |
|  | Year ended December 31, 2011
| Income (Numerator) |  | Shares (Denominator) |  | Per-share Amount
| Net income | $ | 38,156,000 |  |  |  |  |
| Basic earnings per common share | $ | 38,156,000 |  |  | 66,637,000 |  |  | $ | 0.57 |
| Effect of dilutive securities: |  |  |  |  |
| Stock options and restricted stock |  |  | 948,000 |  |  | (0.01 | )
| Diluted earnings per common share | $ | 38,156,000 |  |  | 67,585,000 |  |  | $ | 0.56 |
For the years ended December 31, 2013, 2012 and 2011, options to purchase 546,000, 576,000 and 510,000 shares, respectively, were excluded from the computation of diluted earnings per common share as the exercise price of such options were in excess of the average market value of our common stock at the respective year end.

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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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