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Allowance for Loans Losses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Purchase loans		$ 25,091	$ 34,672
Bad debts recovered		138	116
Outstanding specifically impaired loans		456,474	411,288
Specific impairment		1,684	1,946
Specifically impaired loans [Member]
Bad debts recovered	$ 200		$ 200
Specifically impaired loans [Member] | PCI loans [Member]
Outstanding specifically impaired loans		2,318
Specific impairment		$ 190

X

- Definition

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

+ References

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- Definition

Amount of increase from purchase of financing receivable.

+ References

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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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- Definition

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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