Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares authorized under stock option and incentive plan (in shares)	4,300,000
Number of shares available for future grants of stock options or restricted stock (in shares)	2,747,546
Compensation expense not yet recognized for nonvested share-based awards	$ 34,000
Nonvested share-based awards, expected weighted average period to be recognized (in years)	2 years 4 months 24 days
Total intrinsic value of stock options exercised	$ 2,000	$ 7,000	$ 16,000
Cash received from the exercise of stock options	2,000	8,000	20,000
Aggregate intrinsic value of outstanding stock options	1,000	4,000
Aggregate intrinsic value of exercisable options	$ 1,000	3,000
Outstanding stock options, Weighted average remaining contractual life (in years)	3 years 8 months 12 days
Stock options expected to vest (in shares)	528,192
Stock options expected to vest, Weighted average exercise price (in dollars per share)	$ 57.01
Stock options expected to vest, Weighted average remaining life (in years)	5 years 4 months 24 days
Stock options expected to vest, Aggregate intrinsic value	$ 0
Total fair value at grant date of restricted stock and RSUs vested	$ 27,000	$ 25,000	$ 24,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	7 years
Outstanding stock options, Weighted average remaining contractual life (in years)	2 years 8 months 12 days	2 years 9 months 18 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
restricted stock vesting period	4 years
Ratio of common stock to share based payment award (shares)	1
Granted (in shares)	727,019	433,674	578,056
Expected to vest (in shares)	881,923
Expected to vest, Aggregate intrinsic value	$ 39,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
restricted stock vesting period	4 years
Expected to vest (in shares)	35,771
Expected to vest, Aggregate intrinsic value	$ 2,000
Director | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	39,771	16,722	16,938