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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
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, 2019 and 2018 are:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Net income | $ | 132,168 |  |  | $ | 128,319 |  |  | $ | 372,689 |  |  | $ | 389,834 |
Shares used to compute basic earnings per common share | 150,855,000 |  |  | 156,283,000 |  |  | 152,009,000 |  |  | 157,086,000 |
Dilutive effect of stock options | 3,372,000 |  |  | 4,228,000 |  |  | 3,302,000 |  |  | 4,967,000 |
Shares used to compute diluted earnings per common share | 154,227,000 |  |  | 160,511,000 |  |  | 155,311,000 |  |  | 162,053,000 |
Basic earnings per common share | $ | 0.88 |  |  | $ | 0.82 |  |  | $ | 2.45 |  |  | $ | 2.48 |
Diluted earnings per common share | $ | 0.86 |  |  | $ | 0.80 |  |  | $ | 2.40 |  |  | $ | 2.41 |
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:
| 2019 |  | 2018
Net income | $ | 372,689 |  |  | $ | 389,834 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 22,162 |  |  | 21,515 |
Amortization | 38,407 |  |  | 36,420 |
Equity in earnings of unconsolidated affiliate | (112,758 | ) |  | (123,406 | )
Distributions received from unconsolidated affiliate | 123,663 |  |  | 138,216 |
Stock-based compensation | 15,555 |  |  | 16,396 |
Provision for losses on receivables | 593 |  |  | (29 | )
Deferred income tax expense | (1,405 | ) |  | 8,378 |
Net (gain) loss from investments | (2,121 | ) |  | 460 |
Change in long-term income taxes payable | — |  |  | (9,859 | )
Change in other long-term liabilities | 2,077 |  |  | 1,930 |
Change in other assets | (56 | ) |  | (4,214 | )
Contract costs capitalized, net of amortization | (4,499 | ) |  | (3,463 | )
Other | (721 | ) |  | (99 | )
Change in current assets and liabilities |  |  |
(Increase) decrease in |  |  |
Receivables from investment products | (2,271 | ) |  | 2,263 |
Receivables | (34,589 | ) |  | (44,878 | )
Other current assets | 729 |  |  | (5,955 | )
(Decrease) increase in |  |  |
Accounts payable | (2,208 | ) |  | 3,893 |
Accrued liabilities | (34,087 | ) |  | (9,717 | )
Deferred revenue | 375 |  |  | 213 |
Total adjustments | 8,846 |  |  | 28,064 |
Net cash provided by operating activities | $ | 381,535 |  |  | $ | 417,898 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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