Income Taxes - Summary of Components of Deferred and Other Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Goodwill and other intangibles		$ (45,595)	$ (45,272)
Provision for loan losses		19,198	25,790
Net operating loss carryforwards	[1]	22,607	11,132
Accrued expenses, compensation, and other assets		1,701	1,844
Unrealized gains on other investments		(6,790)	(2,024)
Total deferred tax liability		(8,879)	(8,530)
Valuation allowance		(462)	(255)
Deferred tax liability, net		(9,341)	(8,785)
Taxes receivable		1,516	1,812
Net deferred and other tax liabilities		$ (7,825)	$ (6,973)

[1] As of December 31, 2019, the Company and its subsidiaries had an estimated $89,687 of net operating loss carryforwards, $1,712 which expires at various dates between December 31, 2026 and December 31, 2035, and which had a net asset value of $22,145 as of December 31, 2019.