Fair Value Measurement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 266,276		$ 260,139
Investments under executive deferred compensation plan	27,539		27,270
Private equity securities	177,503		5,890
Private equity securities measured at net asset value	6,388		6,375
Foreign currency forward contracts, assets	0		6,016
Obligations under executive deferred compensation plan	27,539		27,270
Foreign currency forward contracts, liabilities	1,227		3,244
Equity Securities, Purchases	121,900
Equity Securities, FV-NI, Unrealized Gain (Loss)	45,826	$ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	266,276		260,139
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	2,953
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Accretion of Discount	3,184
Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Investments under executive deferred compensation plan	27,539		27,270
Private equity securities	177,503		5,890
Private equity securities measured at net asset value	0		0
Foreign currency forward contracts, assets			0
Obligations under executive deferred compensation plan	27,539		27,270
Foreign currency forward contracts, liabilities	0		0
Quoted Prices in Active Markets for Similar Items (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Investments under executive deferred compensation plan	0		0
Private equity securities	0		0
Private equity securities measured at net asset value	0		0
Foreign currency forward contracts, assets			6,016
Obligations under executive deferred compensation plan	0		0
Foreign currency forward contracts, liabilities	1,227		3,244
Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	266,276		260,139
Investments under executive deferred compensation plan	0		0
Private equity securities	0		0
Private equity securities measured at net asset value	0		0
Foreign currency forward contracts, assets			0
Obligations under executive deferred compensation plan	0		0
Foreign currency forward contracts, liabilities	$ 0		$ 0