Business Impact Of Covid-19 - Summary of Loans Funded under PPPLF (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) Loans
Number of Loans | Loans	720
Long-term Debt, Gross	$ 361.6
PPP Loans [Member]
Long-term Debt, Gross	$ 361.6
Number of Loans as a Percentage of Loans	100.00%
Principal Balance as a Percentage of Loans	100.00%
Gross Loans [Member]
Number of Loans as a Percentage of Loans	35.00%
Principal Balance as a Percentage of Loans	28.00%
Dental services [Member]
Number of Loans | Loans	282
Long-term Debt, Gross	$ 42.8
Dental services [Member] | PPP Loans [Member]
Number of Loans as a Percentage of Loans	39.00%
Principal Balance as a Percentage of Loans	12.00%
Dental services [Member] | Gross Loans [Member]
Number of Loans as a Percentage of Loans	14.00%
Principal Balance as a Percentage of Loans	3.00%
Contractors [Member]
Number of Loans | Loans	113
Long-term Debt, Gross	$ 136.8
Contractors [Member] | PPP Loans [Member]
Number of Loans as a Percentage of Loans	16.00%
Principal Balance as a Percentage of Loans	38.00%
Contractors [Member] | Gross Loans [Member]
Number of Loans as a Percentage of Loans	6.00%
Principal Balance as a Percentage of Loans	11.00%
Other [Member]
Number of Loans | Loans	325
Long-term Debt, Gross	$ 182.0
Other [Member] | PPP Loans [Member]
Number of Loans as a Percentage of Loans	45.00%
Principal Balance as a Percentage of Loans	50.00%
Other [Member] | Gross Loans [Member]
Number of Loans as a Percentage of Loans	15.00%
Principal Balance as a Percentage of Loans	14.00%