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Note 13 - Net Income Per Common Share | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
Earnings Per Share [Text Block] |
13. | NET INCOME PER COMMON SHARE
Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per common share further includes any common shares available to be issued upon vesting or exercise of outstanding equity awards if such inclusion would be dilutive, calculated using the treasury stock method. The following table sets forth the computation of basic and diluted net income per common share (in thousands, except share and per share amounts):
|  | Three Months Ended March 31, |
|  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |
Net income |  | $ | 40,653 |  |  | $ | 32,113 |
Denominator: |  |  |  |  |  |  |  |
Weighted average common shares outstanding - basic |  |  | 5,702,539 |  |  |  | 5,671,838 |
Effect of dilutive equity awards (1) |  |  | 40,109 |  |  |  | 59,063 |
Weighted average common shares outstanding - diluted |  |  | 5,742,648 |  |  |  | 5,730,901 |
Net income per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 7.13 |  |  | $ | 5.66 |
Diluted |  | $ | 7.08 |  |  | $ | 5.60 |
( 1 ) | Equity-based awards whose impact is considered to be anti-dilutive under the treasury stock method were excluded from the diluted net income per share calculation. The excluded number of anti-dilutive equity-based awards totaled 5,355 and 443 for the three months ended March 31, 2018 and 2017, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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