Fair Value Measurements - Schedule of Additional Information about Financial Assets and Liabilities Measured at Fair Value Utilized Level 3 (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Loans Held For Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	$ 464,109	$ 654,733
Total gains or losses during the period recognized in earnings	31,496	138,771
Originations	1,593,515	4,984,363
Sales	(1,886,021)	(5,313,758)
Balance, end of period	203,099	464,109
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	439	10,506
Derivative Financial Assets Tba Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	61	0
Transfers in other	577	61
Balance, end of period	638	61
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	638	61
Interest Rate Lock Commitments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	9,444	32,011
Transfers in other	(6,218)	(22,567)
Balance, end of period	3,226	9,444
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	3,226	9,444
Derivative Financial Liabilities Forward Sales Commitments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	36	0
Transfers in other	7	36
Balance, end of period	43	36
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	43	36
Derivative Financial Liabilities Tba Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	470	0
Transfers in other	(470)	470
Balance, end of period	0	470
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	0	470
Derivative Financial Liabilities Interest Rate Lock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance, beginning of period	25	0
Transfers in other	1,854	25
Balance, end of period	1,879	25
The amount of total gains for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at reporting date	$ 1,879	$ 25