Tax Credit Investments - Affordable Housing Tax Credit Investments, Other Tax Credit Investments, and Related Unfunded Commitments (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Assets:
Other tax credit investments, net	$ 59,100
Other Assets
Other Assets:
Affordable housing tax credit investments, net	25,049	$ 36,961
Other tax credit investments, net	59,081	68,052
Total tax credit investments, net	84,130	105,013
Other Liabilities
Other Liabilities:
Unfunded affordable housing tax credit commitments	1,539	4,520
Unfunded other tax credit commitments	1,139	8,756
Total unfunded tax credit commitments	$ 2,678	$ 13,276