XML 45 R32.htm IDEA: XBRL DOCUMENT v3.21.1
Available-for-Sale Debt Securities by Original Contractual Maturity (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]    
One year or less, amortized cost $ 61,913 $ 64,857
Greater than one year and less than five years, amortized cost 25,463 37,672
Amortized Cost 87,376 102,529
One year or less, fair value 62,100 65,117
Greater than one year and less than five years, fair value 25,732 38,086
Total available-for-sale securities fair value $ 87,832 $ 103,203