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Stock Options And Restricted Stock Awards (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Option Activity and Weighted Average Exercise Price |
|  | For The Year Ended December 31, |  |
|  | 2020 |  |
|  | Options (Amounts in Thousands) |  |  | Weighted Average Exercise Price |  |
Outstanding, beginning of period |  |  | 648 |  |  | $ | 37.43 |  |
Granted |  |  | — |  |  |  | — |  |
Exercised |  |  | (127 | ) |  |  | 31.07 |  |
Forfeited/Cancelled |  |  | (15 | ) |  |  | 37.25 |  |
Outstanding, end of period |  |  | 506 |  |  | $ | 39.03 |  |
Weighted-Average Estimated Fair Value of Employee Stock Options Granted |
|  | For the Years Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | Grants |  |  | Grants |  |  | Grants |
Weighted average fair value |  | $ | — |  |  | $ | 29.78 |  |  | $ | 14.72 |
Risk-free discount rate |  |  | — |  |  | 1.72% - 2.29% |  |  | 2.32% - 2.84% |
Expected life |  |  | — |  |  | 4.2 - 4.4 years |  |  | 4.1 - 4.2 years |
Dividend yield |  |  | — |  |  |  | — |  |  |  | — |
Volatility |  |  | — |  |  | 43% |  |  | 45% |
Summary of Status of Unvested Restricted Stock Awards Outstanding |
|  | For The Year Ended December 31, |
|  | 2020 |
|  | Restricted Stock Awards (Amounts in Thousands) |  |  | Weighted Average Grant Date Fair Value |
Unvested restricted stock awards, beginning of period |  |  | 149 |  |  | $ | 51.10 |
Awarded |  |  | 88 |  |  |  | 101.96 |
Vested |  |  | (77 | ) |  |  | 45.67 |
Forfeited |  |  | (6 | ) |  |  | 45.65 |
Unvested restricted stock awards, end of period |  |  | 154 |  |  | $ | 83.30 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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