Earnings Per Common Share - Summary of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator for both basic and diluted earnings per common share:
Net income available to common shareholders	$ 33,162	$ 39,810
Denominator:
Total average basic common shares outstanding	59,382,758	59,217,711
Effect of dilutive stock options and other stock compensation	140,921	157,342
Total diluted average common shares outstanding	59,523,679	59,375,053
Earnings per common share - basic	$ 0.56	$ 0.67
Earnings per common share - diluted	$ 0.56	$ 0.67