Stock-Based Compensation (Narrative) (Details) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period specified in grant, in years					3 years
Granted	4,736	57,052	4,874	192,407
2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Underlying stock option and restricted stock awards available for grant	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
Underlying stock option and restricted stock awards available for grant	1,804,222				1,804,222
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years					3 years
Granted					160,245
Weighted average fair value of stock awards granted					$ 42.31	$ 43.18
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					71,376
Weighted average fair value of stock awards granted					$ 45.10	$ 44.44
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares					84,296	0
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
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted					7,660
Weighted average fair value of stock awards granted					$ 46.66	$ 45.28