Shareholders' Equity (Narrative) (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) vote class $ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2023 $ / shares shares	Oct. 25, 2021 USD ($)
Class of Stock [Line Items]
Number of classes of common stock | class	1
Stock repurchase program, authorized amount | $	$ 200,000,000				$ 200,000,000
Treasury stock, common shares (in shares) | shares	9,844,746			9,661,845
Purchase of treasury shares | $	$ 14,545,000	$ 85,065,000
Purchases of common stock (in shares) | shares	1,022,717		285,286
Maximum
Class of Stock [Line Items]
Authorized to repurchase shares in amount | $	$ 76,000,000
Treasury Stock, Common
Class of Stock [Line Items]
Treasury stock, common shares (in shares) | shares	9,845,000	9,675,000	8,665,000	9,662,000
Purchase of treasury shares | $	$ 14,545,000	$ 85,065,000	$ 24,400,000
Purchases of common stock (in shares) | shares	182,901	1,022,717
2021 And 2022 Share Purchases
Class of Stock [Line Items]
Treasury stock, common shares (in shares) | shares	1,490,904
Purchase of treasury shares | $	$ 124,000,000
Common Class A
Class of Stock [Line Items]
Common stock, par or stated value per share (in dollars per share) | $ / shares	$ 0.001			$ 0.001
Number of votes entitled to shareholders per share of common stock | vote	1
Common Class B
Class of Stock [Line Items]
Common stock, par or stated value per share (in dollars per share) | $ / shares	$ 0.001