Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 96,049	$ 85,941	$ 85,376	$ 91,847	$ 91,847
ACL on PCD Loans			2,037
Charge-offs	(401)	(387)	(1,144)	(613)	(2,392)
Recoveries	356	653	1,530	1,213	3,086
Provision for (Benefit from) Credit Losses	1,940	(145)	10,145	(6,385)	(7,165)
Ending  Balance	97,944	86,062	97,944	86,062	85,376
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning Balance	3,915	3,580	3,790	3,400	3,400
ACL on PCD Loans			0
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for (Benefit from) Credit Losses	160	(115)	285	65	390
Ending  Balance	4,075	3,465	4,075	3,465	3,790
Credit Loss [Roll Forward]
Beginning Balance	99,964	89,521	89,166	95,247	95,247
ACL on PCD Loans			2,037
Charge-offs	(401)	(387)	(1,144)	(613)	(2,392)
Recoveries	356	653	1,530	1,213	3,086
Provision for (Benefit from) Credit Losses	2,100	(260)	10,430	(6,320)	(6,775)
Ending  Balance	102,019	89,527	102,019	89,527	89,166
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	54,992	50,403	51,140	53,693	53,693
ACL on PCD Loans			1,573
Charge-offs	0	0	(294)	0	(144)
Recoveries	1	0	1	3	806
Provision for (Benefit from) Credit Losses	457	1,234	3,030	(2,059)	(3,215)
Ending  Balance	55,450	51,637	55,450	51,637	51,140
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	23,679	24,604	23,474	25,148	25,148
ACL on PCD Loans			144
Charge-offs	(166)	(86)	(285)	(279)	(751)
Recoveries	230	572	516	973	1,501
Provision for (Benefit from) Credit Losses	188	(1,140)	82	(1,892)	(2,424)
Ending  Balance	23,931	23,950	23,931	23,950	23,474
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	9,042	4,464	3,862	4,252	4,252
ACL on PCD Loans			81
Charge-offs	(235)	(301)	(565)	(334)	(1,470)
Recoveries	124	79	1,011	215	755
Provision for (Benefit from) Credit Losses	1,048	269	5,590	378	325
Ending  Balance	9,979	4,511	9,979	4,511	3,862
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	7,437	5,476	5,667	7,540	7,540
ACL on PCD Loans			201
Charge-offs	0	0	0	0	(27)
Recoveries	0	0	0	0	0
Provision for (Benefit from) Credit Losses	85	(525)	1,654	(2,589)	(1,846)
Ending  Balance	7,522	4,951	7,522	4,951	5,667
Agriculture production
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	883	988	1,215	1,209	1,209
ACL on PCD Loans			38
Charge-offs	0	0	0	0	0
Recoveries	1	2	2	22	24
Provision for (Benefit from) Credit Losses	162	17	(209)	(224)	(18)
Ending  Balance	1,046	1,007	1,046	1,007	1,215
Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	16	6	18	5	5
ACL on PCD Loans			0
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for (Benefit from) Credit Losses	0	0	(2)	1	13
Ending  Balance	16	6	16	6	18
CRE non-owner occupied | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	28,055	26,434	25,739	29,380	29,380
ACL on PCD Loans			746
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	2	12
Provision for (Benefit from) Credit Losses	26	(406)	1,596	(3,354)	(3,653)
Ending  Balance	28,081	26,028	28,081	26,028	25,739
CRE owner occupied | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	12,071	9,874	10,691	10,861	10,861
ACL on PCD Loans			63
Charge-offs	0	0	0	0	(18)
Recoveries	1	0	1	1	794
Provision for (Benefit from) Credit Losses	548	589	1,865	(399)	(946)
Ending  Balance	12,620	10,463	12,620	10,463	10,691
Multifamily | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,987	12,371	12,395	11,472	11,472
ACL on PCD Loans			0
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision for (Benefit from) Credit Losses	(192)	825	(600)	1,724	923
Ending  Balance	11,795	13,196	11,795	13,196	12,395
Farmland | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,879	1,724	2,315	1,980	1,980
ACL on PCD Loans			764
Charge-offs	0	0	(294)	0	(126)
Recoveries	0	0	0	0	0
Provision for (Benefit from) Credit Losses	75	226	169	(30)	461
Ending  Balance	2,954	1,950	2,954	1,950	2,315
SFR 1-4 1st DT liens | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	10,669	10,665	10,723	10,117	10,117
ACL on PCD Loans			144
Charge-offs	0	0	0	0	(145)
Recoveries	1	1	41	11	13
Provision for (Benefit from) Credit Losses	(359)	(37)	(597)	501	738
Ending  Balance	10,311	10,629	10,311	10,629	10,723
SFR HELOCs and junior liens | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	10,843	11,079	10,510	11,771	11,771
ACL on PCD Loans			0
Charge-offs	0	0	0	0	(29)
Recoveries	153	512	328	797	1,127
Provision for (Benefit from) Credit Losses	595	(890)	753	(1,867)	(2,359)
Ending  Balance	11,591	10,701	11,591	10,701	10,510
Other | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,167	2,860	2,241	3,260	3,260
ACL on PCD Loans			0
Charge-offs	(166)	(86)	(285)	(279)	(577)
Recoveries	76	59	147	165	361
Provision for (Benefit from) Credit Losses	(48)	(213)	(74)	(526)	(803)
Ending  Balance	$ 2,029	$ 2,620	$ 2,029	$ 2,620	$ 2,241