Condensed Financial Information - Parent Company Only - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 228,530	$ 270,090
Other assets	71,753	110,293
Total Assets	8,198,056	7,664,297
Liabilities and Stockholders' Equity
Other liabilities	78,200	113,730
Subordinated debentures	179,043	118,257
Total stockholders’ equity	827,014	763,784	$ 725,263	$ 623,739
Total Liabilities and Stockholders’ Equity	8,198,056	7,664,297
Parent Company
Assets
Cash and due from banks	40,228	28,366
Investment in subsidiaries	954,506	843,711
Other assets	12,639	11,274
Total Assets	1,007,373	883,351
Liabilities and Stockholders' Equity
Other liabilities	1,316	1,310
Subordinated debentures	179,043	118,257
Total stockholders’ equity	827,014	763,784
Total Liabilities and Stockholders’ Equity	$ 1,007,373	$ 883,351