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Investment Securities - Unrealized Loss Positions (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months $ 721,038 $ 201,204
Greater than or equal to 12 continuous months 40,899 0
Total Securities in a loss position 761,937 201,204
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (78,169) (2,867)
Greater than or equal to 12 continuous months (7,080) 0
Held-to-maturity, gross unrealized losses (85,249) (2,867)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 850,687 797,781
Available-for-sale, greater than 12 continuous months, fair value 23,349 14,173
Available-for-sale, total securities in a loss position, fair value 874,036 811,954
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (63,542) (12,411)
Available-for-sale, greater than 12 continuous months, unrealized loss (3,768) (615)
Available-for-sale, total securities in a loss position, unrealized loss (67,310) (13,026)
Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Marketable securities, less than 12 continuous months, fair value 1,571,725 998,985
Marketable securities, greater than 12 continuous months, fair value 64,248 14,173
Marketable securities, total securities in a loss position, fair value 1,635,973 1,013,158
Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]    
Marketable securities, less than 12 continuous months, unrealized loss (141,711) (15,278)
Marketable securities, greater than 12 continuous months, unrealized loss (10,848) (615)
Marketable securities, total securities in a loss position, unrealized loss (152,559) (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 302,998 76,619
Greater than or equal to 12 continuous months 0 0
Total Securities in a loss position 302,998 76,619
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (34,731) (712)
Greater than or equal to 12 continuous months 0 0
Held-to-maturity, gross unrealized losses (34,731) (712)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 113,127 263,474
Available-for-sale, greater than 12 continuous months, fair value 0 0
Available-for-sale, total securities in a loss position, fair value 113,127 263,474
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (8,784) (2,784)
Available-for-sale, greater than 12 continuous months, unrealized loss 0 0
Available-for-sale, total securities in a loss position, unrealized loss (8,784) (2,784)
CMOs issued by FHLMC    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 194,163 54,811
Greater than or equal to 12 continuous months 4,018 0
Total Securities in a loss position 198,181 54,811
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (20,136) (1,045)
Greater than or equal to 12 continuous months (630) 0
Held-to-maturity, gross unrealized losses (20,766) (1,045)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 343,897 226,175
Available-for-sale, greater than 12 continuous months, fair value 3,538 4,415
Available-for-sale, total securities in a loss position, fair value 347,435 230,590
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (22,540) (4,677)
Available-for-sale, greater than 12 continuous months, unrealized loss (477) (152)
Available-for-sale, total securities in a loss position, unrealized loss (23,017) (4,829)
CMOs issued by FNMA    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 67,069  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 67,069  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (2,574)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (2,574)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 33,201 37,348
Available-for-sale, greater than 12 continuous months, fair value 4,156 0
Available-for-sale, total securities in a loss position, fair value 37,357 37,348
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (2,674) (611)
Available-for-sale, greater than 12 continuous months, unrealized loss (286) 0
Available-for-sale, total securities in a loss position, unrealized loss (2,960) (611)
CMOs issued by GNMA    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 11,347  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 11,347  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (982)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (982)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 34,696 44,790
Available-for-sale, greater than 12 continuous months, fair value 0 0
Available-for-sale, total securities in a loss position, fair value 34,696 44,790
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (2,414) (553)
Available-for-sale, greater than 12 continuous months, unrealized loss 0 0
Available-for-sale, total securities in a loss position, unrealized loss (2,414) (553)
SBA-backed securities    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 3,178  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 3,178  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (66)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (66)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 51,556 7,478
Available-for-sale, greater than 12 continuous months, fair value 1,059 1,209
Available-for-sale, total securities in a loss position, fair value 52,615 8,687
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (2,091) (112)
Available-for-sale, greater than 12 continuous months, unrealized loss (42) (43)
Available-for-sale, total securities in a loss position, unrealized loss (2,133) (155)
Debentures of government- sponsored agencies    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 61,339 50,571
Greater than or equal to 12 continuous months 36,881 0
Total Securities in a loss position 98,220 50,571
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (11,007) (901)
Greater than or equal to 12 continuous months (6,450) 0
Held-to-maturity, gross unrealized losses (17,457) (901)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 132,004 148,979
Available-for-sale, greater than 12 continuous months, fair value 7,336 8,549
Available-for-sale, total securities in a loss position, fair value 139,340 157,528
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (8,126) (2,527)
Available-for-sale, greater than 12 continuous months, unrealized loss (1,633) (420)
Available-for-sale, total securities in a loss position, unrealized loss (9,759) (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 10,644 11,629
Available-for-sale, greater than 12 continuous months, fair value 0 0
Available-for-sale, total securities in a loss position, fair value 10,644 11,629
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (1,251) (256)
Available-for-sale, greater than 12 continuous months, unrealized loss 0 0
Available-for-sale, total securities in a loss position, unrealized loss (1,251) (256)
Obligations of state and political subdivisions    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 51,313 19,203
Greater than or equal to 12 continuous months 0 0
Total Securities in a loss position 51,313 19,203
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (8,304) (209)
Greater than or equal to 12 continuous months 0 0
Held-to-maturity, gross unrealized losses (8,304) (209)
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 101,078 17,552
Available-for-sale, greater than 12 continuous months, fair value 2,001 0
Available-for-sale, total securities in a loss position, fair value 103,079 17,552
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (13,425) (381)
Available-for-sale, greater than 12 continuous months, unrealized loss (600) 0
Available-for-sale, total securities in a loss position, unrealized loss (14,025) (381)
Corporate bonds    
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 continuous months 29,631  
Greater than or equal to 12 continuous months 0  
Total Securities in a loss position 29,631  
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]    
Less than 12 continuous months (369)  
Greater than or equal to 12 continuous months 0  
Held-to-maturity, gross unrealized losses (369)  
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]    
Available-for-sale, less than 12 continuous months, fair value 28,833 38,495
Available-for-sale, greater than 12 continuous months, fair value 5,259 0
Available-for-sale, total securities in a loss position, fair value 34,092 38,495
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (2,167) (506)
Available-for-sale, greater than 12 continuous months, unrealized loss (730) 0
Available-for-sale, total securities in a loss position, unrealized loss (2,897) (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 1,651 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 1,651 1,861
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, less than 12 continuous months, unrealized loss (70) (4)
Available-for-sale, greater than 12 continuous months, unrealized loss 0 0
Available-for-sale, total securities in a loss position, unrealized loss $ (70) $ (4)