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v3.20.4

Stock-Based Compensation (Detail) - (Table 6) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |  |
Proceeds from Stock Options Exercised | $ 1,609,000 | $ 6,212,000 | $ 13,036,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Non-vested at January 1 | 4,427,000 | 5,137,000 | 5,876,000
Non-vested at January 1 (in Dollars per share) | $ 19.84 | $ 18.42 | $ 17.37
Granted | 561,000 | 633,000 | 509,000
Granted (in Dollars per share) | $ 30.35 | $ 32.64 | $ 31.70
Vested | (1,189,000) | (1,200,000) | (1,177,000)
Vested (in Dollars per share) | $ 19.96 | $ 19.40 | $ 18.44
Non-vested at June 30 | 3,651,000 | 4,427,000 | 5,137,000
Non-vested at June 30 (in Dollars per share) | $ 20.81 | $ 19.84 | $ 18.42
Forfeited | (148,000) | (143,000) | (71,000)
Forfeitures (in dollars per share) | $ 34.89 | $ 28.61 | $ 25.61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 993,000 | $ 4,268,000 | $ 6,841,000

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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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