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Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares authorized to grant |  |  | 5,900,000 |
Stock-based compensation |  |  | $ 81,613 | $ 149,093
Provision for income tax expense (benefit) | $ 41,603 | $ 10,168 | 85,497 | 33,048
Contributions to the Profit Sharing Plan | 1,800 | 1,600 | 5,500 | 4,500
Incentive Stock Award Plans [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation | 32,500 | 56,600 | 98,100 | 151,400
Tax impact related to stock-based compensation provision |  | $ 600 |  | $ 5,800
Incentive Stock Award Plans [Member] | ASU No. 2016-09 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Provision for income tax expense (benefit) | $ (300) |  | $ (17,400) |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total number of stock units outstanding | 19,500,000 |  | 19,500,000 |
Unvested stock units outstanding | 16,100,000 |  | 16,100,000 |
Unrecognized compensation expense related to non-vested options | $ 337,400 |  | $ 337,400 |
Weighted-average period, compensation cost expected to recognized, in years |  |  | 2 years 10 months 25 days |
Performance-based Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 5 years |
Total number of stock units outstanding | 600,000 |  | 600,000 |
Unvested stock units outstanding | 600,000 |  | 600,000 |
Award performance period |  |  | 4 years |
SWAP Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Elective deferrals vested percentage | 100.00% |  | 100.00% |
Percentage of earnings deferred into company stock units | 5.00% |  | 5.00% |
Percentage of earnings deferred into company stock units, Company match | 25.00% |  | 25.00% |
Percentage of earnings deferred into company stock units, Additional elective deferral |  |  | 1.00% |
Minimum [Member] | Deferred Compensation Plans [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 1 year |
Minimum [Member] | Incentive Stock Award Plans [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 1 year |
Minimum [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 1 year |
Minimum [Member] | Performance-based Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Potential percentage of converted shares |  |  | 0.00% |
Minimum [Member] | SWAP Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 1 year |
Maximum [Member] | Deferred Compensation Plans [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 8 years |
Maximum [Member] | Incentive Stock Award Plans [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 10 years |
Maximum [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 10 years |
Maximum [Member] | Performance-based Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Potential percentage of converted shares |  |  | 200.00% |
Maximum [Member] | SWAP Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards vesting period in years |  |  | 8 years |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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