Summary of Restricted Stock Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of shares
Number of shares, Unvested, beginning of year	897	1,083	1,254
Number of shares, Granted	366	293	437
Assumed in CMC acquisition Restricted Stock Units	155	0	0
Number of shares, Vested	(523)	(439)	(564)
Number of shares, Forfeited	(51)	(40)	(44)
Number of shares, Unvested, end of year	844	897	1,083
Weighted average grant date fair value, Unvested
Weighted average grant date fair value, Unvested, beginning of year	$ 62.69	$ 41.31	$ 27.48
Weighted average grant date fair value, Granted	117.82	101.04	57.46
Weighted average grant date fair value, Restricted stock units assumed in acquisition.	92.96	0	0
Weighted average grant date fair value, Vested	64.77	35.58	23.48
Weighted average grant date fair value, Forfeited	85.16	57.39	35.86
Weighted average grant date fair value, Unvested, end of year	$ 90.37	$ 62.69	$ 41.31