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Stock-Based Compensation (Narrative) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 02, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual Percentage Increase In Number Of Shares Available For Issuance	1.50%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	607,066
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		16,358,071		16,358,071
Remaining Aggregate Number of Shares Available For Issuance		7,684,850		7,684,850
Share-based Compensation		$ 3,900,000	$ 3,000,000	$ 11,500,000	$ 8,500,000
Share-based Payment Arrangement, Amount Capitalized				0	0
Share-based Payment Arrangement, Expense, Tax Benefit		(400,000)	$ (200,000)	(1,900,000)	(1,000,000)
Share-based Payment Award, Options, Vested, Fair Value				1,100,000	$ 1,800,000
Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized		$ 1,200,000		$ 1,200,000
Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized, Period for Recognition				1 year
Restricted Stock [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				1 year	1 year