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Equity Incentive Plan (Tables)
3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Restricted Share Awards
A summary of the shares granted to executive officers that have not fully vested pursuant to the Equity Incentive Plan as of March 31, 2018 is as follows:
Award Type
Award Date
 
Total Shares Granted
 
Vested as of March 31, 2018
2015 Time-based Awards
1/30/2015
 
40,161

 
40,161

2015 Performance-based Awards
1/30/2015
 
36,144

 
12,048

2015 Time-based Awards
6/1/2015
 
8,949

 
5,966

2017 Restricted Board Awards
1/11/2017
 
5,000

 
1,666

A summary of the Company’s restricted share awards for the three months ended March 31, 2018 and the year ended December 31, 2017 is as follows:
 
Three Months Ended
 
Year Ended
 
March 31, 2018
 
December 31, 2017
 
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

Granted

 

 
5,000

 
20.20

Vested
(27,101
)
 
25.77

 
(32,441
)
 
25.77

Forfeited
(24,096
)
 
$
21.21

 
(25,870
)
 
$
13.17

Non-vested at end of the period
6,317

 
$
23.78

 
57,514

 
$
23.78

Schedule of Share-based Payment Award, Valuation Assumptions
The grant date fair value of the performance LTIP awards were determined using a Monte Carlo simulation method with the following assumptions (based on the three-year risk free U.S. Treasury yield over the measurement period of the LTIP awards):
 
Grant Date
Volatility
Dividend Yield
Risk Free Interest Rate
Discount
Outperformance Plan
6/1/2015
26%
4.5%
0.95%
—%
2016 Time-Based LTIP Unit Awards
1/28/2016
28%
—%
0.79%
7.5%
2016 Performance-Based LTIP Unit Awards
1/28/2016
30%
5.8%
1.13%
—%
2017 Time-Based LTIP Unit Awards
3/1/2017
24%
—%
0.92%
7.5%
2017 Performance-Based LTIP Unit Awards
3/1/2017
25%
5.8%
1.47%
—%
2018 Time-Based LTIP Unit Awards
3/1/2018
26%
—%
2.07%
7.5%
2018 Performance-Based LTIP Unit Awards
3/1/2018
26%
6.2%
2.37%
—%
The grant date fair values of the performance-based share awards were determined using a Monte Carlo simulation method with the following assumptions:
Performance Award
 
 
 
 
 
Risk Free Interest
Grant Date
 
Volatility
 
Dividend Yield
 
Rate
1/30/2015
 
29%
 
—%
 
0.84%
Schedule of Long Term Incentive Unit Awards
A summary of the Company's LTIP Unit awards for the three months ended March 31, 2018 and the year ended December 31, 2017 is as follows:
 
Three Months Ended
 
Year Ended
 
March 31, 2018
 
December 31, 2017
 
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

Granted
244,917

 
16.94

 
223,922

 
19.20

Vested
(67,275
)
 
16.42

 
(37,417
)
 
14.73

Non-vested at end of the period
659,698

 
$
20.08

 
482,056

 
$
16.58

Schedule of Time-Based Equity Incentive Plan
A summary of time-based LTIP unit awards granted, as recommended by the Compensation Committee, are as follows:

Grant Date
 
Number of Shares Granted
 
Estimated Value Per Share
 
Vesting 1st Year Date
 
Vesting 2nd Year Date
 
Vesting 3rd Year Date
 
 
 
 
 
 
 
 
 
 
 
January 28, 2016
 
72,966

 
$
16.69

 
1/28/2017
 
1/28/2018
 
1/28/2019
March 1, 2017
 
89,574

 
$
18.53

 
3/1/2018
 
3/1/2019
 
3/1/2020
March 1, 2018
 
97,968

 
$
16.83

 
3/1/2019
 
3/1/2020
 
3/1/2021
Schedule of Performance-Based Long-Term Incentive Plan Payout Unit Awards
The 2017 and 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%