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Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | Share option activity during the years indicated is as follows:
| Number of Shares |  | Weighted-Average Exercise Price Per Share
Balance at December 31, 2018 | 118,400 |  |  | $ | 7.44 |
Exercised | (84,400) |  |  | 7.24 |
Balance at December 31, 2019 | 34,000 |  |  | 7.95 |
Exercised | (34,000) |  |  | 7.95 |
Balance at December 31, 2020 | — |  |  | $ | — |
Schedule of Nonvested Share Activity | Non-vested share activity for the years ended December 31, 2020 and 2019, is as follows:
| Number of Shares |  | Weighted-Average Grant-Date Fair Value Per Share
Balance at December 31, 2018 | 3,455,077 |  |  | $ | 7.34 |
Granted | 829,581 |  |  | 5.97 |
Vested | (151,447) |  |  | 5.06 |
Forfeited | (1,191,799) |  |  | 6.76 |
Balance at December 31, 2019 | 2,941,412 |  |  | 7.30 |
Granted | 709,250 |  |  | 7.77 |
Vested | (613,504) |  |  | 8.80 |
Forfeited | (332,429) |  |  | 5.30 |
Balance at December 31, 2020 | 2,704,729 |  |  | $ | 7.27 |
Schedule of Share-based Compensation, Activity | During 2020 and 2019, the Company granted common shares to certain employees and trustees as follows:
| 2020 |  | 2019
Performance Shares(1) |  |  |
Shares issued: |  |  |
Index | 232,993 |  | 276,063
Peer | 232,987 |  | 276,058
Grant date fair value per share:(2) |  |  |
Index | $6.59 |  | $5.05
Peer | $5.97 |  | $4.67
Non-Vested Common Shares:(3) |  |  |
Shares issued | 243,270 |  | 277,460
Grant date fair value | $2,581 |  | $2,270
(1) The shares vest based on the Company's total shareholder return growth after a three-year measurement period relative to an index and a group of Company peers. Dividends will not be paid on these grants until earned. Once the performance criteria are met and the actual number of shares earned is determined, such shares vest immediately. During 2020, 122,779 of the 452,737 performance shares issued in 2017 vested. During 2019, 713,044 of the 808,929 performance shares issued in 2016 vested. (2) The fair value of grants was determined at the grant date using a Monte Carlo simulation model. (3) The shares vest ratably over a three-year service period

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -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 (c)(2) -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 (d) -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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