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Equity Incentive Plan (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Restricted Share Awards | A summary of the Company’s restricted share awards for the years ended December 31, 2018, 2017 and 2016 is as follows:
| December 31, 2018 |  |  |  | December 31, 2017 |  |  |  | December 31, 2016 |  |
| Number of Shares |  | Weighted - Average Grant Date Fair Value |  | Number of Shares |  | Weighted - Average Grant Date Fair Value |  | Number of Shares |  | Weighted - Average Grant Date Fair Value
Non-vested at beginning of the period | 57,514 |  | $ | 23.78 |  | 110,825 |  | $ | 22.05 |  | 170,480 |  | $ | 21.38
Granted | 5,000 |  | 17.40 |  | 5,000 |  | 20.20 |  | — |  | —
Vested | (30,084) |  | 26.24 |  | (32,441) |  | 25.77 |  | (59,655) |  | 20.14
Forfeited | (24,096) |  | 21.21 |  | (25,870) |  | 13.17 |  | — |  | —
Unvested at end of the period | 8,334 |  | $ | 18.52 |  | 57,514 |  | $ | 23.78 |  | 110,825 |  | $ | 22.05
Schedule of Share-based Compensation Arrangements by Share-based Payment Award | A summary of the Company's LTIP unit awards for the years ended years ended December 31, 2018, 2017 and 2016 is as follows:
| December 31, 2018 |  |  |  | December 31, 2017 |  |  |  | December 31, 2016 |  |
| Number of Shares |  | Weighted - Average Grant Date Fair Value |  | Number of Shares |  | Weighted - Average Grant Date Fair Value |  | Number of Shares |  | Weighted - Average Grant Date Fair Value
Non-vested at beginning of the period | 482,056 |  | $ | 16.58 |  | 295,551 |  | $ | 14.36 |  | 183,300 |  | $ | 14.13
Granted | 244,917 |  | 16.94 |  | 223,922 |  | $ | 19.20 |  | 112,251 |  | $ | 14.73
Vested | (67,275) |  | 16.42 |  | (37,417) |  | $ | 14.73 |  | — |  | $ | —
Forfeited | (183,300) |  | 14.13 |  | — |  | $ | — |  | — |  | $ | —
Non-vested at end of period | 476,398 |  | $ | 17.73 |  | 482,056 |  | $ | 16.58 |  | 295,551 |  | $ | 14.36
Schedule of Share-based Payment Award, Performance-Based Long-Term Incentive Plan Payout Unit Awards | The 2018 Performance-Based LTIP Unit Awards, if earned, will be paid out between 50% and 150% of target value as follows:
| Relative TSR Hurdles (Percentile) |  | Payout Percentage
Threshold | 25th |  |  | 50% |
Target | 50th |  |  | 100% |
Maximum | 75th |  |  | 150% |
Schedule of Share-based Payment Award, Valuation Assumptions | The grant date fair value of the LTIPs and the assumptions used to estimate the values are as follows:
| Grant Date | Number of Units Granted |  | Estimated Value per Unit |  | Volatility |  | Dividend Yield |  | Risk Free Interest Rate
Outperformance Plan | 6/1/2015 | 183,300 | $14.13 | 26% |  | 4.5% |  | 0.95% |
2016 Time-Based LTIP Unit Awards | 1/28/2016 | 72,966 | $16.69 | 28% |  | —% |  | 0.79% |
2016 Performance-Based LTIP Unit Awards | 1/28/2016 | 39,285 | $11.09 | 30% |  | 5.8% |  | 1.13% |
2017 Time-Based LTIP Unit Awards | 3/1/2017 | 89,574 | $18.53 | 24% |  | —% |  | 0.92% |
2017 Performance-Based LTIP Unit Awards | 3/1/2017 | 134,348 | $19.65 | 25% |  | 5.8% |  | 1.47% |
2018 Time-Based LTIP Unit Awards | 3/1/2018 | 97,968 | $16.83 | 26% |  | —% |  | 2.07% |
2018 Performance-Based LTIP Unit Awards | 3/1/2018 | 146,949 | $17.02 | 26% |  | 6.20% |  | 2.37% |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + 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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