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Stock Based Compensation - Non-vested Restricted Stock, PSU and RSU Award Activity (Details) - $ / shares | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Restricted Stock |  |
Number of Non-vested Restricted Shares |  |
Non-vested shares at beginning of period (in shares) | 526,074 | 477,276
Granted (in shares) | 275,248 | 304,417
Vested (in shares) | (244,015) | (221,239)
Forfeited (in shares) | (8,186) | (14,958)
Non-vested shares at end of period (in shares) | 549,121 | 545,496
Weighted Average Per Share Grant Date Fair Value |  |
Non-vested shares at beginning of period (in dollars per share) | $ 16.34 | $ 20.20
Granted (in dollars per share) | 12.36 | 14.36
Vested (in dollars per share) | 18.18 | 21.97
Forfeited (in dollars per share) | (12.92) | (15.84)
Non-vested shares at end of period (in dollars per share) | $ 13.58 | $ 16.31
Restricted Stock | 2017 Incentive Plan |  |
Number of Non-vested Restricted Shares |  |
Non-vested shares at beginning of period (in shares) | 526,074 |
Non-vested shares at end of period (in shares) | 549,121 |
PSUs, Target | 2017 Incentive Plan |  |
Number of Non-vested Restricted Shares |  |
Non-vested shares at beginning of period (in shares) | 786,577 | 844,185
Granted (in shares) | 366,210 | 211,133
Vested (in shares) | (201,978) | (268,729)
Forfeited (in shares) | (44,984) | 0
Non-vested shares at end of period (in shares) | 905,825 | 786,589
PSUs | 2017 Incentive Plan |  |
Number of Non-vested Restricted Shares |  |
Vested (in shares) | (161,583) | (183,374)
Weighted Average Per Share Grant Date Fair Value |  |
Non-vested shares at beginning of period (in dollars per share) | $ 23.06 | $ 21.70
Granted (in dollars per share) | 13.41 | 19.47
Vested (in dollars per share) | 28.18 | 16.00
Forfeited (in dollars per share) | (20.89) | 0
Non-vested shares at end of period (in dollars per share) | $ 18.12 | $ 23.05
Fair value, expected term | 3 years |
RSUs | 2017 Incentive Plan |  |
Number of Non-vested Restricted Shares |  |
Non-vested shares at beginning of period (in shares) | 263,708 | 254,052
Granted (in shares) | 244,140 | 105,566
Vested (in shares) | (131,094) | (95,910)
Forfeited (in shares) | (24,780) | 0
Non-vested shares at end of period (in shares) | 351,974 | 263,708
Weighted Average Per Share Grant Date Fair Value |  |
Non-vested shares at beginning of period (in dollars per share) | $ 16.11 | $ 17.45
Granted (in dollars per share) | 10.24 | 14.88
Vested (in dollars per share) | 17.40 | 18.32
Forfeited (in dollars per share) | (14.80) | 0
Non-vested shares at end of period (in dollars per share) | $ 11.65 | $ 16.10

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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