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Stock-Based Awards (Tables) | 12 Months Ended
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Dec. 31, 2023
Stock-Based Awards [Abstract] |
Schedule of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period | A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:
|  | December 31, 2023
Unrecognized Stock-Based Compensation |  | Weighted-Average Remaining Vesting Period (Years)
Employees and directors |  | $ | 19,165 |  | 0.92
Schedule of Restricted Stock Activity and Restricted Stock Unit | A summary of activity is as follows:
|  | RSA |  | RSU |  | PRSU(1)
Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Unvested Balance at January 1, 2021 |  | 3,580,743 |  | $ | 5.38 |  | 39,408 |  | $ | 4.46 |  | 341,312 |  | $ | 5.17
Granted |  | 1,642,266 |  |  | 5.46 |  | 31,170 |  |  | 5.43 |  | 257,043(2) |  |  | 6.49
Vested |  | (1,897,699) |  |  | 5.78 |  | (15,136) |  |  | 4.73 |  | — |  |  | —
Forfeited |  | (288,405) |  |  | 5.11 |  | (452) |  |  | 5.37 |  | (47,669) |  |  | 5.74
Unvested Balance at December 31, 2021 |  | 3,036,905 |  | $ | 5.20 |  | 54,990 |  | $ | 4.93 |  | 550,686 |  | $ | 5.73
Granted |  | 2,170,432 |  |  | 5.71 |  | 116,247 |  |  | 5.18 |  | 319,838(2) |  |  | 6.80
Vested |  | (1,621,201) |  |  | 5.31 |  | (27,894) |  |  | 5.10 |  | (202,336) |  |  | 6.24
Forfeited |  | (195,054) |  |  | 5.43 |  | (1,380) |  |  | 5.73 |  | — |  |  | —
Unvested Balance at December 31, 2022 |  | 3,391,082 |  | $ | 5.46 |  | 141,963 |  | $ | 5.09 |  | 668,188 |  | $ | 6.09
Granted |  | 3,363,501 |  |  | 5.63 |  | 152,265 |  |  | 6.24 |  | 576,240(2) |  |  | 6.49
Vested |  | (1,629,925) |  |  | 5.28 |  | (72,461) |  |  | 5.66 |  | (108,113) |  |  | 3.11
Forfeited |  | (114,436) |  |  | 5.55 |  | (34,385) |  |  | 5.70 |  | — |  |  | —
Stock dividends accrued |  | — |  |  | — |  | 2,762 |  |  | 6.24 |  | 37,777 |  |  | 6.49
Unvested Balance at December 31, 2023 |  | 5,010,222 |  | $ | 5.63 |  | 190,144(3) |  | $ | 5.70 |  | 1,174,092 |  | $ | 6.58
​(1) Represents the target number of PRSUs granted and outstanding. The number of PRSUs that ultimately vest ranges from 0% to 200% of this amount. During the years ended December 31, 2023, 2022 and 2021, 200%, 77% and 0%, respectively, of the target number of PRSUs granted ultimately vested, inclusive of accrued stock dividends. ​(2) A Monte Carlo simulation was used to value these awards using the following assumptions for the Company and the peer group: (i) beginning 90-day average stock prices; (ii) valuation date stock prices; (iii) correlation coefficients based upon the price data used to calculate the historical volatilities; and (iv) the following additional assumptions: ​(3) Includes 57,779 deferred RSUs that have vested.
Schedule of Share Based Payment Awards Other than Options Valuation Assumptions | the following additional assumptions:
|  | Granted in 2023 |  | Granted in 2022 |  | Granted in 2021
Historical stock price volatility (low) |  | 37% |  | 33% |  | 34%
Historical stock price volatility (high) |  | 56% |  | 57% |  | 57%
Historical stock price volatility (average) |  | 47% |  | 44% |  | 44%
Risk free interest rate |  | 3.80% |  | 1.28% |  | 0.17%
Expected dividend yield |  | 0.00% |  | 0.00% |  | 0.00%

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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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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