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Net Income Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Basic and diluted net income per common share | Basic and diluted net income per common share calculations are as follows for the periods presented:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Basic |  |  |  |  |
Net income applicable to common stock | $ | 83,651 |  |  | $ | 167,596 |  |  | $ | 146,920 |
Average common shares outstanding | 56,270,566 |  |  | 58,046,716 |  |  | 52,492,104 |
Net income per common share—basic | $ | 1.49 |  |  | $ | 2.89 |  |  | $ | 2.80 |
Diluted |  |  |  |  |
Net income applicable to common stock | $ | 83,651 |  |  | $ | 167,596 |  |  | $ | 146,920 |
Average common shares outstanding | 56,270,566 |  |  | 58,046,716 |  |  | 52,492,104 |
Effect of dilutive stock-based compensation | 197,599 |  |  | 179,970 |  |  | 134,746 |
Average common shares outstanding—diluted | 56,468,165 |  |  | 58,226,686 |  |  | 52,626,850 |
Net income per common share—diluted | $ | 1.48 |  |  | $ | 2.88 |  |  | $ | 2.79 |
Schedule of potentially dilutive securities excluded from computation of earnings per share | Outstanding stock-based compensation awards that could potentially dilute basic net income per common share in the future that were not included in the computation of diluted net income per common share due to their anti-dilutive effect were as follows for the periods presented:
| Year Ended
| December 31,
| 2020 |  | 2019 |  | 2018
Number of shares | 245,146 |  | 643 |  | 73,257
Range of exercise prices (for stock option awards) | — |  | — |  | —

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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