Employment Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2024

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]

The amount of stock-based compensation expense and corresponding after-tax expense from continuing operations are as follows.


Year Ended December 31,	2024		2023		2022

Restricted stock units	$	3,144	$	3,462	$	2,911
Performance awards	6,212		8,804		8,320
Total stock-based compensation	$	9,356	$	12,266	$	11,231
Total stock-based compensation (after-tax)	$	9,356	$	12,266	$	11,231

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

A summary of RSU activity for 2024 is as follows.


	Shares	Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period	1,036,339	$	15.75
Granted	250,992	14.28
Delivered or returned to plan (1)	(208,038)	14.67
Forfeited	(4,268)	15.52
Outstanding at end of period	1,075,025	$	15.62

(1) When restricted stock unit awards issued by Ambac become taxable compensation to employees, shares may be withheld to cover the employee’s withholding taxes. For the year ended December 31, 2024, Ambac withheld 19,335 shares from employees that settled restricted stock units to meet the required tax withholdings.

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

A summary of PSU activity for 2024 is as follows.


	Shares	Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period	1,019,071	$	15.52
Granted (1)	371,877	15.94
Delivered (2)	(312,280)	10.02
Forfeited	(20,017)	15.57
Performance adjustment (3)	204,860	18.67
Outstanding at end of period	1,263,511	$	—

(1) Represents performance share units at 100% of units granted for LTIP Awards.

(2) Reflects the number of performance shares attributable to the performance goals attained over the completed performance period and for which service conditions have been met. When performance stock unit awards issued by Ambac become taxable compensation to employees, shares may be withheld to cover the employee’s withholding taxes. For the year ended December 31, 2024, Ambac withheld 24,431 of shares from employees that settled performance based restricted stock units to meet the required tax withholdings.

(3) Represents the number of additional shares issued for awards granted in 2021 as a result of actual performance during the performance period.