Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Supplemental disclosure:
Interest paid	$ 418	$ 0	$ 533	$ 0
Income taxes paid	10,805	2,529	10,981	2,742
Non-cash investing and financing activities:
Non-cash capital expenditures	221	(2,109)	679	(1,845)
Dividends declared	$ 10,096	$ 9,970	$ 10,096	$ 9,970

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Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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