Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of increase from purchase of financing receivable.

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of FHLB debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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Loans and Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Purchase loans		$ 19,686,000	$ 34,672,000
Bad debts recovered		211,000	116,000
Outstanding specifically impaired loans		642,262,000	411,288,000
Specific impairment		1,408,000	1,946,000
Gross loans		647,572,000	415,587,000
Doubtful [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans		0	0
Loss [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans		0	0
Specifically impaired loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Bad debts recovered	$ 200,000		200,000
Specifically impaired loans [Member] \| PCI loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Outstanding specifically impaired loans		2,270,000
Specific impairment		190,000
FHLB [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment pledged		$ 146,075,000	$ 104,791,000