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Stock-Based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Outstanding Awards Under 2013 Omnibus Equity Incentive Plan | Activity under the 2013 Plan consisted of the following (dollars in thousands, except per share data):
|  | RSA Grants to Non-employee Directors |  |  | RSU Grants to Employees |  |  | RSU Grants to Independent Contractors |  |  | Total |  |  | Weighted- Average Grant Date Fair Value Per Share |
Nonvested shares at December 31, 2018 |  |  | 27,096 |  |  |  | 471,782 |  |  |  | 392,697 |  |  |  | 891,575 |  |  | $ | 27.59 |
Granted |  |  | 12,806 |  |  |  | 241,932 |  |  |  | 76,642 |  |  |  | 331,380 |  |  |  | 38.62 |
Vested |  |  | (22,422 | ) |  |  | (182,714 | ) |  |  | (183,762 | ) |  |  | (388,898 | ) |  |  | 24.11 |
Transferred |  |  | — |  |  |  | (8,136 | ) |  |  | 8,136 |  |  |  | — |  |  |  | 29.68 |
Forfeited/canceled |  |  | — |  |  |  | (8,119 | ) |  |  | (32,354 | ) |  |  | (40,473 | ) |  |  | 30.99 |
Nonvested shares at September 30, 2019 (1) |  |  | 17,480 |  |  |  | 514,745 |  |  |  | 261,359 |  |  |  | 793,584 |  |  | $ | 33.73 |
Unrecognized stock-based compensation expense as of September 30, 2019 (2) |  | $ | 397 |  |  | $ | 14,629 |  |  | $ | 8,473 |  |  | $ | 23,499 |  |  |  |  |
Weighted average remaining vesting period (years) as of September 30, 2019 |  |  | 0.63 |  |  |  | 3.70 |  |  |  | 3.45 |  |  |  | 3.56 |  |  |  |  |
(1) | Nonvested RSUs will be settled through the issuance of new shares of common stock.
(2) | The total unrecognized compensation expense is expected to be recognized over a weighted-average period of approximately ​​​​​​​3.56 years.
Schedule of Future Share Settlements | Future share settlements of fully vested DSUs by year consisted of the following:
|  | September 30, 2019 |
2021 |  |  | 60,373 |
2022 |  |  | 281,193 |
|  |  | 341,566 |
Stock-Based Compensation Expense | Components of stock-based compensation are included in selling, general and administrative expense in the condensed consolidated statements of net and comprehensive income and consisted of the following (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
ESPP |  | $ | 40 |  |  | $ | 37 |  |  | $ | 108 |  |  | $ | 100 |
RSAs – non-employee directors |  |  | 157 |  |  |  | 182 |  |  |  | 481 |  |  |  | 458 |
RSUs – employees (1) |  |  | 1,230 |  |  |  | 1,112 |  |  |  | 4,197 |  |  |  | 3,161 |
RSUs – independent contractors (2) |  |  | 687 |  |  |  | 1,816 |  |  |  | 2,254 |  |  |  | 5,200 |
|  | $ | 2,114 |  |  | $ | 3,147 |  |  | $ | 7,040 |  |  | $ | 8,919 |
(1) | 2019 includes expense related to the acceleration of vesting of certain RSUs.
(2) | The Company grants RSUs to independent contractors (i.e. investment sales and financing professionals), who are considered non-employees​​​​​​​. Prior to the adoption of ASU No. 2018-07 on July 1, 2018, such awards were required to be measured at fair value at the end of each reporting period until settlement. Stock-based compensation expense was therefore impacted by the changes in the Company’s common stock price during each reporting period prior to the date of adoption. New awards after the date of adoption are measured based on the grant date closing price of the Company’s common stock consistent with awards made to the Company’s employees and non-employee directors.

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- Definition Schedule of share based compensation restricted stock awards, RSUs, unrecognized stock based compensation, weighted average grant date fair value per share and weighted average remaining vesting period. + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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=116856206&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=116856206&loc=d3e5047-113901 + Details
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