Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ (62,005)	$ (57,920)
Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(81,466)	(76,709)
Tax effect	19,461	18,789
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	2,396	633
Cash Flow Hedges [Member] | Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	3,163	839
Tax effect	(767)	(206)
Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(64,401)	(58,553)
Available for Sale Securities [Member] | Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(84,629)	(77,548)
Tax effect	$ 20,228	$ 18,995