Fair Value Measurements (Changes in the Fair Value of Real Estate Fund Investments and Deferred Compensation Plan Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Real estate fund investments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 930	$ 3,739	$ 7,730	$ 3,739
Purchases/additional fundings	0	0	0	789
Previously recorded unrealized loss on exited investments	0	0	59,396	0
Realized loss on exited investments	0	0	(53,724)	0
Net unrealized loss on held investments	0	0	(6,800)	(789)
Sales/Dispositions	0	0	(5,672)	0
Ending balance	930	3,739	930	3,739
Deferred Compensation Plan Assets
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	44,155	44,855	45,016	39,928
Purchases/additional fundings	522	2,154	3,469	5,167
Sales/Dispositions	(504)	(1,547)	(3,291)	(2,236)
Realized and unrealized gains (losses)	574	(69)	(1,524)	2,193
Other, net	164	1,176	1,241	1,517
Ending balance	$ 44,911	$ 46,569	$ 44,911	$ 46,569