Income Taxes - Tax Effect of Significant Items Comprising the Net Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax asset:
Benefits from net operating loss carryforwards	$ 7,833	$ 7,112
Long-term incentive compensation plans	24,468	22,363
Investment basis differences	5,523	5,256
Depreciation and amortization	3,942	2,065
Lease liability	5,327	5,994
Other, primarily accrued expenses deductible when paid	4,917	4,737
Deferred tax assets, gross	52,010	47,527
Less: valuation allowance	(3,828)	(3,025)
Deferred tax asset	48,182	44,502
Deferred tax liability:
Intangible assets	7,622	7,933
Investment in foreign subsidiaries	4,084	3,048
Right-of-use asset	4,490	4,975
Other	2,075	1,760
Deferred tax liability	18,271	17,716
Net deferred tax asset	$ 29,911	$ 26,786

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Deferred Tax Assets, Depreciation And Amortization

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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