Equity Awards - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of shares
Grants (in shares)	0	0	0
Weighted- average exercise price
Grants, weighted-average exercise price (in dollars share)	$ 0	$ 0	$ 0
Stock options
Number of shares
Beginning balance (in shares)	23,676	25,574	46,096
Exercise of stock options, net (in shares)	(377)	(1,632)	(20,522)
Forfeitures/expirations (in shares)	0	(266)	0
Ending balance (in shares)	23,299	23,676	25,574	46,096
Exercisable (in shares)	23,299
Weighted- average exercise price
Beginning Balance, weighted-average exercise price (in dollars share)	$ 65.30	$ 65.80	$ 63.49
Exercises, weighted-average exercise price (in dollars share)	36.87	69.44	60.62
Forfeitures/Expirations, weighted-average exercise price (in dollars share)	0	87.66	0
Ending Balance, weighted-average exercise price (in dollars share)	65.76	$ 65.30	$ 65.80	$ 63.49
Weighted-average exercise price (in dollars per share)	$ 65.76
Weighted-average remaining contractual life (years)	3 years	4 years	5 years	5 years 2 months 12 days
Exercisable, weighted-average remaining contractual life (years)	3 years
Aggregate intrinsic value	$ 352	$ 93	$ 755	$ 4,398
Exercisable, aggregate intrinsic value	$ 352

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.