XML 61 R51.htm IDEA: XBRL DOCUMENT v3.22.0.1
Investment Securities, Debt Securities by Credit Quality Indicator (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Security
Dec. 31, 2020
USD ($)
Available-for-sale Debt Securities by Credit Quality Indicator [Abstract]    
Amortized cost $ 272,436 $ 789,175
Gross unrealized gains 3,437 18,716
Gross unrealized losses 5,419 159
Fair value 270,454 807,732
Held-to-Maturity Debt Securities by Credit Quality Indicator [Abstract]    
Amortized cost 737,052 68,933
Gross unrealized gains 782 1,116
Gross unrealized losses 11,993 0
Fair value $ 725,841 $ 70,049
Investment Securities, Qualitative Disclosure [Abstract]    
Number of investment securities held | Security 654  
Less than 12 months, number of positions | Security 82  
12 months or more, number of positions | Security 71