Stock-Based Compensation (Narrative) (Details) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period specified in grant, in years							3 years
Granted	133	17,054	222,782	6,555	4,736	57,052
2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance	0						0
Amended and Restated Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	6,250,000						6,250,000
Maximum number of shares may be issued pursuant to stock awards, stock units and other stock-based awards							3,125,000
Maximum number of shares subject to grants to any one individual in any one year							500,000
Shares available for issuance	1,533,338						1,533,338
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years							3 years
Granted							162,030
Weighted average fair value of stock awards granted							$ 45.06	$ 42.31
Amortization period of fair value of shares, in months							36 months
Performance Share Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn							0.00%
Performance Share Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn							200.00%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period							3 years
Granted							75,414
Weighted average fair value of stock awards granted							$ 45.53	45.10
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares							74,632
Vesting period, start, in years							1 year
Vesting period, in years							10 years
Stock Options [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							33.00%
Stock Options [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							33.00%
Stock Options [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							33.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted							0
Weighted average fair value of stock awards granted							$ 0	42.75
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares	0
Granted							18,676
Weighted average fair value of stock awards granted							$ 41.78	$ 46.40