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Earnings Per Share and Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating basic net income per share | The following is a reconciliation of Registrant’s net income and weighted average common shares outstanding for calculating basic net income per share reflecting the two-for-one stock split effective September 3, 2013:
Basic |  | For The Years Ended December 31,
(in thousands, except per share amounts) |  | 2013 |  | 2012 |  | 2011
Net income from continuing operations |  | $ | 62,686 |  |  | $ | 54,148 |  |  | $ | 42,010 |
Net income from discontinued operations |  | — |  |  | — |  |  | 3,849 |
Net income |  | 62,686 |  |  | 54,148 |  |  | 45,859 |
Less: (a) Distributed earnings to common shareholders |  | 29,366 |  |  | 24,129 |  |  | 20,563 |
Distributed earnings to participating securities |  | 171 |  |  | 171 |  |  | 140 |
Undistributed earnings |  | 33,149 |  |  | 29,848 |  |  | 25,156 |
(b) Undistributed earnings allocated to common shareholders |  | 32,958 |  |  | 29,638 |  |  | 24,985 |
Undistributed earnings allocated to participating securities |  | 191 |  |  | 210 |  |  | 171 |
Total income available to common shareholders, basic (a)+(b) |  | $ | 62,324 |  |  | $ | 53,767 |  |  | $ | 45,548 |
Weighted average common shares outstanding, basic |  | 38,639 |  |  | 37,998 |  |  | 37,386 |
Basic earnings per common share: |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.61 |  |  | $ | 1.42 |  |  | $ | 1.12 |
Income from discontinued operations |  | — |  |  | — |  |  | 0.10 |
Net Income |  | $ | 1.61 |  |  | $ | 1.42 |  |  | $ | 1.22 |
Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating diluted net income per share | The following is a reconciliation of Registrant’s net income and weighted average common shares outstanding for calculating diluted net income per share reflecting the two-for-one stock split effective September 3, 2013:
Diluted |  | For The Years Ended December 31,
(in thousands, except per share amounts) |  | 2013 |  | 2012 |  | 2011
Common shareholders earnings, basic |  | $ | 62,324 |  |  | $ | 53,767 |  |  | $ | 45,548 |
Undistributed earnings for dilutive stock options |  | 191 |  |  | 210 |  |  | 171 |
Total common shareholders earnings, diluted |  | $ | 62,515 |  |  | $ | 53,977 |  |  | $ | 45,719 |
Weighted average common shares outstanding, basic |  | 38,639 |  |  | 37,998 |  |  | 37,386 |
Stock-based compensation (1) |  | 230 |  |  | 264 |  |  | 288 |
Weighted average common shares outstanding, diluted |  | 38,869 |  |  | 38,262 |  |  | 37,674 |
Diluted earnings per common share |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 1.61 |  |  | $ | 1.41 |  |  | $ | 1.11 |
Income from discontinued operations |  | — |  |  | — |  |  | 0.10 |
Net income |  | $ | 1.61 |  |  | $ | 1.41 |  |  | $ | 1.21 |
(1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 264,596 stock options and 237,956 restricted stock units, including performance awards, at December 31, 2013 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

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- Definition Tabular disclosure of the effect of income (loss) on basic 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 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=16381557&loc=d3e4984-109258 Reference 5: 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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