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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2021
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, 2021 and 2020 are:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Net income | $ | 133,778 |  |  | $ | 101,066 |  |  | $ | 263,248 |  |  | $ | 210,308 |
Shares used to compute basic earnings per common share | 142,074,000 |  |  | 147,478,000 |  |  | 142,638,000 |  |  | 148,473,000 |
Dilutive effect of stock options | 2,138,000 |  |  | 2,120,000 |  |  | 2,121,000 |  |  | 2,510,000 |
Shares used to compute diluted earnings per common share | 144,212,000 |  |  | 149,598,000 |  |  | 144,759,000 |  |  | 150,983,000 |
Basic earnings per common share | $ | 0.94 |  |  | $ | 0.69 |  |  | $ | 1.85 |  |  | $ | 1.42 |
Diluted earnings per common share | $ | 0.93 |  |  | $ | 0.68 |  |  | $ | 1.82 |  |  | $ | 1.39 |
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:
| 2021 |  | 2020
Net income | $ | 263,248 |  |  | $ | 210,308 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 16,733 |  |  | 15,113 |
Amortization | 29,075 |  |  | 26,217 |
Equity in earnings of unconsolidated affiliate | (68,415) |  |  | (58,183) |
Distributions received from unconsolidated affiliate | 68,064 |  |  | 73,241 |
Stock-based compensation | 19,855 |  |  | 13,991 |
Provision for losses on receivables | 2,088 |  |  | (122) |
Deferred income tax expense | (6,869) |  |  | (5,459) |
Net (gain) loss from investments | (709) |  |  | 2,086 |
Change in other long-term liabilities | 987 |  |  | (1,448) |
Change in other assets | (976) |  |  | (6,135) |
Contract costs capitalized, net of amortization | 429 |  |  | (2,117) |
Other | 929 |  |  | (1,217) |
Change in current assets and liabilities |  |  |
(Increase) decrease in |  |  |
Receivables from investment products | (906) |  |  | 4,292 |
Receivables | (26,437) |  |  | (11,134) |
Other current assets | 538 |  |  | (2,716) |
Advances due from unconsolidated affiliate | 51,364 |  |  | 11,261 |
(Decrease) increase in |  |  |
Accounts payable | 1,525 |  |  | 6,357 |
Accrued liabilities | (25,721) |  |  | (9,367) |
Deferred revenue | 195 |  |  | (836) |
Total adjustments | 61,749 |  |  | 53,824 |
Net cash provided by operating activities | $ | 324,997 |  |  | $ | 264,132 |

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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=124432515&loc=d3e3550-109257 + Details
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