Stock Compensation - Restricted Stock and Performance Share Grants (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 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 three months ended March 31, 2020:

	March 31, 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	(221,941	)
Expired/Forfeited Grants	—
Stock Grants Outstanding End of Period at Target Achievement	965,402

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 three months ended March 31, 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)	Three Months Ended March 31,
Employee Plan:	2020		2019
Expensed	$	1,111	$	666
Capitalized	366		319
	1,477		985
NDSI Plan - Expensed	114		147
Total Stock Compensation Costs	$	1,591	$	1,132