XML 54 R43.htm IDEA: XBRL DOCUMENT v3.21.2
Securities (Summary of Book Values and Fair Values of Investment Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Fair Value    
Amortized Cost $ 2,114,614 $ 1,432,684
Fair Value 2,115,153 1,453,132
Unrealized Gains 19,999 22,963
Unrealized (Losses) (19,460) (2,515)
Debt Securities, Held-to-maturity, Maturity [Abstract]    
Amortized Cost 291,728 167,551
Fair Value 292,774 170,734
Unrealized Gains 3,247 3,348
Unrealized (Losses) (2,201) (165)
Government-sponsored enterprise securities    
Fair Value    
Amortized Cost 70,015 70,016
Fair Value 67,872 70,206
Unrealized Gains 0 371
Unrealized (Losses) (2,143) (181)
Mortgage-backed securities    
Fair Value    
Amortized Cost 2,000,949 1,318,998
Fair Value 2,002,319 1,337,706
Unrealized Gains 18,541 20,832
Unrealized (Losses) (17,171) (2,124)
Debt Securities, Held-to-maturity, Maturity [Abstract]    
Amortized Cost 24,267 29,959
Fair Value 25,236 30,900
Unrealized Gains 969 941
Unrealized (Losses) 0 0
Corporate bonds    
Fair Value    
Amortized Cost 43,650 43,670
Fair Value 44,962 45,220
Unrealized Gains 1,458 1,760
Unrealized (Losses) (146) (210)
State and local governments    
Debt Securities, Held-to-maturity, Maturity [Abstract]    
Amortized Cost 267,461 137,592
Fair Value 267,538 139,834
Unrealized Gains 2,278 2,407
Unrealized (Losses) $ (2,201) $ (165)