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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 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 nine months ended September 30, 2020 and 2019 are:
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Net income | $ | 111,096 |  |  | $ | 132,168 |  |  | $ | 321,404 |  |  | $ | 372,689 |
Shares used to compute basic earnings per common share | 145,812,000 |  |  | 150,855,000 |  |  | 147,586,000 |  |  | 152,009,000 |
Dilutive effect of stock options | 2,095,000 |  |  | 3,372,000 |  |  | 2,372,000 |  |  | 3,302,000 |
Shares used to compute diluted earnings per common share | 147,907,000 |  |  | 154,227,000 |  |  | 149,958,000 |  |  | 155,311,000 |
Basic earnings per common share | $ | 0.76 |  |  | $ | 0.88 |  |  | $ | 2.18 |  |  | $ | 2.45 |
Diluted earnings per common share | $ | 0.75 |  |  | $ | 0.86 |  |  | $ | 2.14 |  |  | $ | 2.40 |
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 nine months ended September 30:
| 2020 |  | 2019
Net income | $ | 321,404 |  |  | $ | 372,689 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 23,058 |  |  | 22,162 |
Amortization | 39,417 |  |  | 38,407 |
Equity in earnings of unconsolidated affiliate | (86,488) |  |  | (112,758) |
Distributions received from unconsolidated affiliate | 119,821 |  |  | 123,663 |
Stock-based compensation | 20,458 |  |  | 15,555 |
Provision for losses on receivables | 109 |  |  | 593 |
Deferred income tax expense | (7,731) |  |  | (1,405) |
Net loss (gain) from investments | 1,310 |  |  | (2,121) |
Change in other long-term liabilities | (4,442) |  |  | 2,077 |
Change in other assets | (965) |  |  | (56) |
Contract costs capitalized, net of amortization | (2,842) |  |  | (4,499) |
Other | (1,053) |  |  | (721) |
Change in current assets and liabilities |  |  |
(Increase) decrease in |  |  |
Receivables from investment products | 2,521 |  |  | (2,271) |
Receivables | (37,921) |  |  | (34,589) |
Other current assets | (6,186) |  |  | 729 |
(Decrease) increase in |  |  |
Accounts payable | 8,615 |  |  | (2,208) |
Accrued liabilities | 8,809 |  |  | (34,087) |
Deferred revenue | (1,370) |  |  | 375 |
Total adjustments | 75,120 |  |  | 8,846 |
Net cash provided by operating activities | $ | 396,524 |  |  | $ | 381,535 |

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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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