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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Stock-Based Compensation Expense |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Year ended December 31,
﻿ | 2018 |  | 2017 |  | 2016
﻿Stock-based compensation expense | $ | 69,947 |  | $ | 66,396 |  | $ | 65,112
﻿Stock-based compensation expense, net of tax | $ | 51,544 |  | $ | 40,370 |  | $ | 35,974
﻿Stock-based compensation expense recognized as capitalized development | $ | 783 |  | $ | 1,141 |  | $ | 946
﻿Excess tax benefit (deficit) on stock-based compensation recognized in provision for income taxes | $ | (6,162) |  | $ | 448 |  | $ | -
﻿
Summary Of Option And SOSAR Activity Under Incentive Plan | ﻿
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017 |  | 2016
﻿ | Shares |  | Weighted-Average Exercise Price Per Share |  | Shares |  | Weighted-Average Exercise Price Per Share |  | Shares |  | Weighted-Average Exercise Price Per Share
﻿Outstanding, beginning of year | 1,999 |  | $ | 480.09 |  | 1,917 |  | $ | 490.06 |  | 1,694 |  | $ | 490.70
﻿Granted | 741 |  | $ | 396.66 |  | 304 |  | $ | 426.70 |  | 460 |  | $ | 457.77
﻿Exercised | (408) |  | $ | 353.98 |  | (35) |  | $ | 307.83 |  | (124) |  | $ | 315.87
﻿Forfeited or cancelled | (180) |  | $ | 489.14 |  | (187) |  | $ | 527.53 |  | (113) |  | $ | 559.25
﻿Expired | (1) |  | $ | 437.62 |  | - |  | $ | - |  | - |  | $ | -
﻿Outstanding, end of year | 2,151 |  | $ | 474.51 |  | 1,999 |  | $ | 480.09 |  | 1,917 |  | $ | 490.06
﻿ ﻿
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﻿ | Shares |  | Weighted-Average Exercise Price Per Share |  | Weighted-Average Remaining Years of Contractual Life |  | Aggregate Intrinsic Value
﻿Outstanding as of December 31, 2018 | 2,151 |  | $ | 474.51 |  | 3.8 |  | $ | 49,160
﻿Vested and expected to vest as of December 31, 2018 | 2,107 |  | $ | 476.09 |  | 3.7 |  | $ | 47,427
﻿Exercisable as of December 31, 2018 | 1,047 |  | $ | 538.93 |  | 2.3 |  | $ | 10,627
﻿
Summary Of Non-Vested Stock Award Activity Under Incentive Plan |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017 |  | 2016
﻿ | Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Shares |  | Weighted Average Grant Date Fair Value Per Share
﻿Outstanding, beginning of year | 213 |  | $ | 519.62 |  | 125 |  | $ | 606.24 |  | 116 |  | $ | 511.88
﻿Granted | 141 |  | $ | 305.00 |  | 127 |  | $ | 436.36 |  | 90 |  | $ | 509.05
﻿Vested | (39) |  | $ | 732.65 |  | (8) |  | $ | 454.84 |  | (7) |  | $ | 605.83
﻿Forfeited or cancelled | (91) |  | $ | 473.64 |  | (31) |  | $ | 502.46 |  | (74) |  | $ | 529.54
﻿Expired | - |  | $ | - |  | - |  | $ | - |  | - |  | $ | -
﻿Outstanding, end of year | 224 |  | $ | 373.32 |  | 213 |  | $ | 519.62 |  | 125 |  | $ | 606.24
﻿
Change In Awards Expected To Vest |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |
﻿ | Year ended December 31,
﻿ | 2018 |  | 2017 |  | 2016
﻿Cumulative change in expense | $ | (79) |  | $ | (1,410) |  | $ | (6,031)
﻿Net of tax impact from cumulative change in expense | $ | (58) |  | $ | (857) |  | $ | (3,332)
﻿Impact on basic earnings per share | $ | - |  | $ | 0.03 |  | $ | 0.11
﻿Impact on diluted earnings per share | $ | - |  | $ | 0.03 |  | $ | 0.11
﻿
SOSARS [Member] |
Schedule Of Assumptions to Value SOSAR or Stock Awards Granted |
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﻿ |  | 2018 |  | 2017 |  | 2016
﻿Risk-free interest rate |  |  | 2.4 | % |  |  | 1.6 | % |  |  | 1.0 | %
﻿Expected life (years) |  |  | 3.9 |  |  |  | 3.7 |  |  |  | 3.5 |
﻿Expected dividend yield |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
﻿Volatility |  |  | 32.2 | % |  |  | 29.9 | % |  |  | 32.2 | %
﻿Weighted-average Black-Scholes fair value per share at date of grant |  | $ | 77.61 |  |  | $ | 105.97 |  |  | $ | 117.48 |
﻿
Performance Shares [Member] |
Schedule Of Assumptions to Value SOSAR or Stock Awards Granted |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | 2018 |  | 2017 |  | 2016
﻿Risk-free interest rate |  |  | N/A |  |  |  | 1.5 | % |  |  | 0.9 | %
﻿Expected life (years) |  |  | N/A |  |  |  | 3.0 |  |  |  | 3 |
﻿Expected dividend yield |  |  | N/A |  |  |  | 0.0 | % |  |  | 0.0 | %
﻿Volatility |  |  | N/A |  |  |  | 29.9 | % |  |  | 31.4 | %
﻿

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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