Net Income per Common Share - Computation of Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income	$ 9,555	$ 5,623	$ 25,095	$ 15,901	$ 15,178	$ 40,996
Numerator for basic net income per common share	9,555		25,095		15,178	40,996
Numerator for diluted net income per common share	$ 9,555		$ 25,095		$ 15,178	$ 40,996
Denominator:
Denominator for basic net income per common share - adjusted weighted-average shares	71,700		75,170		72,271	75,488
Effect of dilutive securities:
Unvested restricted stock and stock units	330		491		331	498
Dilutive potential common shares	330		491		331	498
Denominator for diluted net income per common share - adjusted weighted-average shares	72,030		75,661		72,602	75,986
Basic net income per common share	$ 0.13		$ 0.33		$ 0.21	$ 0.54
Diluted net income per common share	$ 0.13		$ 0.33		$ 0.21	$ 0.54