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Stock Compensation - Restricted Stock and Performance Share Grants (Tables)
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Summary of performance share grants with performance conditions
The following is a summary of the Company's Performance Condition Grants as of the six months ended June 30, 2020:
Performance Condition Grants
Below threshold performance
—

Threshold performance
67,713

Target performance
621,515

Maximum performance
1,063,367
Summary of stock grant activity
The following is a summary of the Company’s stock grant activity, both time and performance share grants, assuming target achievement for outstanding performance grants for the six months ended June 30, 2020:
 
June 30, 2020
Stock Grants Outstanding Beginning of Period at Target Achievement
409,373

New Stock Grants/Additional Shares due to Achievement in Excess of Target
777,970

Vested Grants
(224,441
)
Expired/Forfeited Grants
—

Stock Grants Outstanding End of Period at Target Achievement
962,902
Summary of assumptions used to determine the price of market-based Performance Condition Grants
The following is a summary of the assumptions used to determine the price for the Company's market-based Performance Condition Grants for the six months ended June 30, 2020:
($ in thousands except for share prices)
 
 
 
Grant date
December 12, 2019
 
March 11, 2020
Vesting end
December 31, 2022
 
December 31, 2022
Share price at target achievement
$18.80
 
$16.36
 
 
 
 
Expected volatility
17.28%
 
18.21%
Risk-free interest rate
1.69%
 
0.58%
 
 
 
 
Simulated Monte Carlo share price
$11.95
 
$5.87
Shares granted
6,327
 
81,716
Total fair value of award
$76
 
$480
Summary of stock compensation costs for Employee and NDSI Plans
The following table summarizes stock compensation costs for the Company's 1998 Stock Incentive Plan, or the Employee Plan, and NDSI Plan for the following periods:
($ in thousands)
Six Months Ended June 30,
Employee Plan:
2020
 
2019
    Expensed
$
2,179

 
$
1,311

    Capitalized
649

 
633

 
2,828

 
1,944

NDSI Plan - Expensed
220

 
281

Total Stock Compensation Costs
$
3,048

 
$
2,225