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Net Income Per Common Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Net Income Per Common Share | Net Income Per Common Share (In Thousands, Except Share Data) Basic net income per common share is calculated by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted net income per common share reflects the pro forma dilution of shares outstanding, assuming outstanding stock options were exercised into common shares and nonvested restricted stock awards, whose vesting is subject to future service requirements, were outstanding common shares as of the awards’ respective grant dates, calculated in accordance with the treasury method. Basic and diluted net income per common share calculations are as follows for the periods presented:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Basic |  |  |  |  |
Net income applicable to common stock | $ | 92,188 |  |  | $ | 90,930 |  |  | $ | 68,014 |
Average common shares outstanding | 46,874,502 |  |  | 41,737,636 |  |  | 35,971,877 |
Net income per common share—basic | $ | 1.97 |  |  | $ | 2.18 |  |  | $ | 1.89 |
Diluted |  |  |  |  |
Net income applicable to common stock | $ | 92,188 |  |  | $ | 90,930 |  |  | $ | 68,014 |
Average common shares outstanding | 46,874,502 |  |  | 41,737,636 |  |  | 35,971,877 |
Effect of dilutive stock-based compensation | 127,014 |  |  | 251,819 |  |  | 255,562 |
Average common shares outstanding—diluted | 47,001,516 |  |  | 41,989,455 |  |  | 36,227,439 |
Net income per common share—diluted | $ | 1.96 |  |  | $ | 2.17 |  |  | $ | 1.88 |
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,
| 2017 |  | 2016 |  | 2015
Number of shares | 77,545 |  | — |  | —
Range of exercise prices (for stock option awards) | — |  | — |  | —

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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 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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