Schedule of Common Stock Repurchases (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Stockholders' Equity Note [Abstract]
Shares repurchased	0		52,716		144,864	155,741
Cost of shares repurchased	$ 0	$ 95,987	$ 35,925	$ 63,192	$ 96,000	$ 99,100
Average price per share repurchased	$ 0		$ 681.49		$ 662.60	$ 636.42

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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