XML 123 R49.htm IDEA: XBRL DOCUMENT v3.23.3
Investment Securities - Investments by Contractual Maturity Date (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Sep. 30, 2022
Amortized Cost, Available-for-sale securities    
Amortized cost $ 2,118,616 $ 2,162,737
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains 2,910 1,308
Gross unrealized loss (126,429) (113,008)
Fair Value, Available-for-sale securities    
Available-for-sale securities, at fair value $ 1,995,097 $ 2,051,037
Yield, Available-for-sale securities    
Yield 4.64% 3.36%
Amortized Cost, Held-to-maturity securities    
Held-to-maturity securities, amortized cost $ 423,586 $ 463,299
Gross Unrealized Gains / Losses, Held-to-maturity securities    
Gross unrealized gains 0 22
Gross unrealized losses (68,398) (56,461)
Fair Value, Held-to-maturity securities    
Fair value $ 355,188 $ 406,860
Yield, Held-to-maturity securities    
Without single maturity date   2.88%
Yield 2.88%  
Investments $ 2,542,202 $ 2,626,036
Gross unrealized gains on investments 2,910 1,330
Gross unrealized losses on investments (194,827) (169,469)
Total Financial Assets $ 2,350,285 $ 2,457,897
Yield on investments 4.35% 3.28%
U.S. government and agency securities due    
Amortized Cost, Available-for-sale securities    
Within 1 year $ 3,501  
1 to 5 years 18,894 $ 40,403
5 to 10 years 87,922  
Over 10 years 106,340  
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains, within 1 year 0  
Gross unrealized gains, 1 to 5 years 0 0
Gross unrealized gains, 5 to 10 years 177  
Gross unrealized gains, over 10 years 831  
Gross unrealized losses, within 1 year (36)  
Gross unrealized losses, 1 to 5 years (563) (1,049)
Gross unrealized losses, 5 to 10 years 0  
Gross unrealized losses, over 10 years (13)  
Fair Value, Available-for-sale securities    
Within 1 year 3,465  
1 to 5 years 18,331 $ 39,354
5 to 10 years 88,099  
Over 10 years $ 107,158  
Yield, Available-for-sale securities    
Within 1 year 6.06%  
1 to 5 years 4.70% 3.03%
5 to 10 years 5.76%  
Over 10 years 5.84%  
Asset-backed securities due    
Amortized Cost, Available-for-sale securities    
1 to 5 years $ 18,579 $ 22,527
5 to 10 years 36,875 82,962
Over 10 years 539,911 668,482
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains, 1 to 5 years 0 0
Gross unrealized gains, 5 to 10 years 2 4
Gross unrealized gains, over 10 years 578 783
Gross unrealized losses, 1 to 5 years (715) (1,141)
Gross unrealized losses, 5 to 10 years (99) (547)
Gross unrealized losses, over 10 years (7,115) (6,069)
Fair Value, Available-for-sale securities    
1 to 5 years 17,864 21,386
5 to 10 years 36,778 82,419
Over 10 years $ 533,374 $ 663,196
Yield, Available-for-sale securities    
1 to 5 years 6.06% 3.27%
5 to 10 years 6.11% 3.53%
Over 10 years 6.35% 3.86%
Corporate debt securities    
Amortized Cost, Available-for-sale securities    
Within 1 year   $ 75,000
1 to 5 years $ 151,893 151,411
5 to 10 years 113,221 114,414
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains, within 1 year   4
Gross unrealized gains, 1 to 5 years 895 0
Gross unrealized gains, 5 to 10 years 0 0
Gross unrealized losses, within 1 year   (200)
Gross unrealized losses, 1 to 5 years (1,787) (2,748)
Gross unrealized losses, 5 to 10 years (21,700) (24,124)
Fair Value, Available-for-sale securities    
Within 1 year   74,804
1 to 5 years 151,001 148,663
5 to 10 years $ 91,521 $ 90,290
Yield, Available-for-sale securities    
Within 1 year   3.74%
1 to 5 years 5.14% 3.59%
5 to 10 years 3.87% 3.87%
Municipal bonds    
Amortized Cost, Available-for-sale securities    
5 to 10 years $ 5,720 $ 5,751
Over 10 years 29,832 29,871
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains, 5 to 10 years 0 0
Gross unrealized gains, over 10 years 361 400
Gross unrealized losses, 5 to 10 years (701) (361)
Gross unrealized losses, over 10 years (550) (699)
Fair Value, Available-for-sale securities    
5 to 10 years 5,019 5,390
Over 10 years $ 29,643 $ 29,572
Yield, Available-for-sale securities    
5 to 10 years 3.00% 3.00%
Over 10 years 5.85% 5.85%
Agency pass-through certificates    
Amortized Cost, Available-for-sale securities    
Without single maturity date $ 1,005,928 $ 971,916
Gross Unrealized Gains / Losses, Available-for-sale securities    
Gross unrealized gains, without single maturity date 66 117
Gross unrealized losses, without single maturity date (93,150) (76,070)
Fair Value, Available-for-sale securities    
Without single maturity date $ 912,844 $ 895,963
Yield, Available-for-sale securities    
Without single maturity date 3.39% 2.81%
Amortized Cost, Held-to-maturity securities    
Without single maturity date $ 423,586 $ 463,299
Gross Unrealized Gains / Losses, Held-to-maturity securities    
Gross unrealized gains, without single maturity date 0 22
Gross unrealized losses, without single maturity date (68,398) (56,461)
Fair Value, Held-to-maturity securities    
Without single maturity date $ 355,188 $ 406,860
Yield, Held-to-maturity securities    
Without single maturity date 2.88% 2.88%