Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation between Federal Statutory Income Tax Rate and Effective Tax Rates (Detail)

v3.20.4
Income Taxes - Reconciliation between Federal Statutory Income Tax Rate and Effective Tax Rates (Detail)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Federal statutory income tax rate 21.00% 21.00% 21.00%
State taxes, net of federal tax benefits 7.86% 9.39% 9.50%
Tax credit - federal (2.68%) (3.49%) (2.37%)
Federal rate adjustment, net of federal benefits of state 0.00% 0.00% 1.32%
Low-income housing amortization 3.02% 4.17% 2.40%
Other (0.12%) (0.32%) (0.76%)
Effective tax rate 29.08% 30.75% 31.09%