Fair Value of Assets and Liabilities - Summary Of The Reconciliation For All Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs Level (3) (Detail) - Available-for-sale Securities $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 6,310
Gains and losses (realized/unrealized):
Included in net income	27
Included in other comprehensive income	(88)
Ending balance	$ 6,249