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Investment Securities - Unrealized Loss Positions (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months $ 597,282 $ 201,204
Greater than or equal to 12 continuous months 221,768 0
Total Securities in a loss position 819,050 201,204
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (76,898) (2,867)
Greater than or equal to 12 continuous months (53,921) 0
Held-to-maturity, gross unrealized losses (130,819) (2,867)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 540,739 797,781
Available-for-sale, greater than 12 continuous months, fair value 270,350 14,173
Available-for-sale, total securities in a loss position, fair value 811,089 811,954
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (58,206) (12,411)
Available-for-sale, greater than 12 continuous months, unrealized loss (40,784) (615)
Available-for-sale, total securities in a loss position, unrealized loss (98,990) (13,026)
Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Marketable securities, less than 12 continuous months, fair value 1,138,021 998,985
Marketable securities, greater than 12 continuous months, fair value 492,118 14,173
Marketable securities, total securities in a loss position, fair value 1,630,139 1,013,158
Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]    
Marketable securities, less than 12 continuous months, unrealized loss (135,104) (15,278)
Marketable securities, greater than 12 continuous months, unrealized loss (94,705) (615)
Marketable securities, total securities in a loss position, unrealized loss (229,809) (15,893)
MBS pass-through securities issued by FHLMC, FNMA and GNMA    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 203,739 76,619
Greater than or equal to 12 continuous months 78,562 0
Total Securities in a loss position 282,301 76,619
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (36,140) (712)
Greater than or equal to 12 continuous months (17,519) 0
Held-to-maturity, gross unrealized losses (53,659) (712)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 54,639 263,474
Available-for-sale, greater than 12 continuous months, fair value 44,711 0
Available-for-sale, total securities in a loss position, fair value 99,350 263,474
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (6,702) (2,784)
Available-for-sale, greater than 12 continuous months, unrealized loss (7,000) 0
Available-for-sale, total securities in a loss position, unrealized loss (13,702) (2,784)
CMOs issued by FHLMC    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 144,517 54,811
Greater than or equal to 12 continuous months 51,272 0
Total Securities in a loss position 195,789 54,811
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (18,126) (1,045)
Greater than or equal to 12 continuous months (12,146) 0
Held-to-maturity, gross unrealized losses (30,272) (1,045)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 192,988 226,175
Available-for-sale, greater than 12 continuous months, fair value 128,923 4,415
Available-for-sale, total securities in a loss position, fair value 321,911 230,590
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (17,898) (4,677)
Available-for-sale, greater than 12 continuous months, unrealized loss (17,677) (152)
Available-for-sale, total securities in a loss position, unrealized loss (35,575) (4,829)
CMOs issued by FNMA    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 108,978  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 108,978  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (6,066)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (6,066)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 7,310 37,348
Available-for-sale, greater than 12 continuous months, fair value 26,638 0
Available-for-sale, total securities in a loss position, fair value 33,948 37,348
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (514) (611)
Available-for-sale, greater than 12 continuous months, unrealized loss (3,663) 0
Available-for-sale, total securities in a loss position, unrealized loss (4,177) (611)
CMOs issued by GNMA    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 19,059  
Greater than or equal to 12 continuous months 10,807  
Total Securities in a loss position 29,866  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (735)  
Greater than or equal to 12 continuous months (1,469)  
Held-to-maturity, gross unrealized losses (2,204)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 11,248 44,790
Available-for-sale, greater than 12 continuous months, fair value 22,039 0
Available-for-sale, total securities in a loss position, fair value 33,287 44,790
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (399) (553)
Available-for-sale, greater than 12 continuous months, unrealized loss (3,060) 0
Available-for-sale, total securities in a loss position, unrealized loss (3,459) (553)
SBA-backed securities    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 2,230  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 2,230  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (143)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (143)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 37,629 7,478
Available-for-sale, greater than 12 continuous months, fair value 6,649 1,209
Available-for-sale, total securities in a loss position, fair value 44,278 8,687
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (3,443) (112)
Available-for-sale, greater than 12 continuous months, unrealized loss (142) (43)
Available-for-sale, total securities in a loss position, unrealized loss (3,585) (155)
Debentures of government- sponsored agencies    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 54,445 50,571
Greater than or equal to 12 continuous months 66,109 0
Total Securities in a loss position 120,554 50,571
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (6,704) (901)
Greater than or equal to 12 continuous months (18,489) 0
Held-to-maturity, gross unrealized losses (25,193) (901)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 128,077 148,979
Available-for-sale, greater than 12 continuous months, fair value 6,844 8,549
Available-for-sale, total securities in a loss position, fair value 134,921 157,528
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (12,060) (2,527)
Available-for-sale, greater than 12 continuous months, unrealized loss (2,125) (420)
Available-for-sale, total securities in a loss position, unrealized loss (14,185) (2,947)
U.S. Treasury securities    
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 0 11,629
Available-for-sale, greater than 12 continuous months, fair value 10,159 0
Available-for-sale, total securities in a loss position, fair value 10,159 11,629
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss 0 (256)
Available-for-sale, greater than 12 continuous months, unrealized loss (1,741) 0
Available-for-sale, total securities in a loss position, unrealized loss (1,741) (256)
Obligations of state and political subdivisions    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 35,899 19,203
Greater than or equal to 12 continuous months 15,018 0
Total Securities in a loss position 50,917 19,203
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (7,399) (209)
Greater than or equal to 12 continuous months (4,298) 0
Held-to-maturity, gross unrealized losses (11,697) (209)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 84,021 17,552
Available-for-sale, greater than 12 continuous months, fair value 14,406 0
Available-for-sale, total securities in a loss position, fair value 98,427 17,552
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (15,366) (381)
Available-for-sale, greater than 12 continuous months, unrealized loss (3,368) 0
Available-for-sale, total securities in a loss position, unrealized loss (18,734) (381)
Corporate bonds    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 28,415  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 28,415  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (1,585)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (1,585)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 23,221 38,495
Available-for-sale, greater than 12 continuous months, fair value 9,981 0
Available-for-sale, total securities in a loss position, fair value 33,202 38,495
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (1,779) (506)
Available-for-sale, greater than 12 continuous months, unrealized loss (2,008) 0
Available-for-sale, total securities in a loss position, unrealized loss (3,787) (506)
Asset-backed securities    
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 1,606 1,861
Available-for-sale, greater than 12 continuous months, fair value 0 0
Available-for-sale, total securities in a loss position, fair value 1,606 1,861
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (45) (4)
Available-for-sale, greater than 12 continuous months, unrealized loss 0 0
Available-for-sale, total securities in a loss position, unrealized loss $ (45) $ (4)