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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2020
Accounting Policies [Abstract] |
Calculation Of Basic And Diluted Earnings Per Share | The calculations of basic and diluted earnings per share for the three and six months ended June 30, 2020 and 2019 are:
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Net income | $ | 101,066 |  |  | $ | 126,540 |  |  | $ | 210,308 |  |  | $ | 240,521 |
Shares used to compute basic earnings per common share | 147,478,000 |  |  | 151,863,000 |  |  | 148,473,000 |  |  | 152,587,000 |
Dilutive effect of stock options | 2,120,000 |  |  | 3,302,000 |  |  | 2,510,000 |  |  | 3,266,000 |
Shares used to compute diluted earnings per common share | 149,598,000 |  |  | 155,165,000 |  |  | 150,983,000 |  |  | 155,853,000 |
Basic earnings per common share | $ | 0.69 |  |  | $ | 0.83 |  |  | $ | 1.42 |  |  | $ | 1.58 |
Diluted earnings per common share | $ | 0.68 |  |  | $ | 0.82 |  |  | $ | 1.39 |  |  | $ | 1.54 |
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities | The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the six months ended June 30:
| 2020 |  | 2019
Net income | $ | 210,308 |  |  | $ | 240,521 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 15,113 |  |  | 14,753 |
Amortization | 26,217 |  |  | 25,460 |
Equity in earnings of unconsolidated affiliate | (58,183) |  |  | (75,149) |
Distributions received from unconsolidated affiliate | 84,502 |  |  | 77,288 |
Stock-based compensation | 13,991 |  |  | 10,102 |
Provision for losses on receivables | (122) |  |  | 383 |
Deferred income tax expense | (5,459) |  |  | (2,050) |
Net loss (gain) from investments | 2,086 |  |  | (1,510) |
Change in other long-term liabilities | (1,448) |  |  | 1,129 |
Change in other assets | (6,135) |  |  | 249 |
Contract costs capitalized, net of amortization | (2,117) |  |  | (1,125) |
Other | (1,217) |  |  | 122 |
Change in current assets and liabilities |  |  |
(Increase) decrease in |  |  |
Receivables from investment products | 4,292 |  |  | (2,538) |
Receivables | (11,134) |  |  | (20,192) |
Other current assets | (2,716) |  |  | 3,708 |
(Decrease) increase in |  |  |
Accounts payable | 6,357 |  |  | (5,426) |
Accrued liabilities | (9,367) |  |  | (47,631) |
Deferred revenue | (836) |  |  | (449) |
Total adjustments | 53,824 |  |  | (22,876) |
Net cash provided by operating activities | $ | 264,132 |  |  | $ | 217,645 |

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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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