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Net income Per Share (Notes) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | 3. Net Income Per Share The following table reconciles basic net income per common share to diluted net income per share for the three months ended March 31, 2019 and 2018, respectively:
| Three Months Ended March 31,
(in thousands, except per share amounts) | 2019 |  | 2018
Net income available to common stockholders | $ | 22,662 |  |  | $ | 25,429 |
Basic weighted-average shares outstanding | 44,874 |  |  | 46,615 |
Dilutive effect of potential common stock equivalents — stock options and restricted stock units | 339 |  |  | 394 |
Diluted weighted-average shares outstanding | 45,213 |  |  | 47,009 |
Earnings per common share: |  |  |  |  |
Basic | $ | 0.51 |  |  | $ | 0.55 |
Diluted | $ | 0.50 |  |  | $ | 0.54 |

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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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