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Shareholders' Equity (Tables)
9 Months Ended
Sep. 30, 2024
Stockholders' Equity Note [Abstract]  
Accumulated Other Comprehensive Income (Loss) [Table Text Block]
A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):
Unrealized Gain (Loss) on
Available-for-Sale Securities
Investment Securities Transferred from AFSTotal
Balance, Dec. 31, 2022$(664,618)$(172,337)$(836,955)
Net change in unrealized gain (loss)
(171,977)— (171,977)
Reclassification adjustments included in earnings:
Interest revenue, Investment securities— 46,996 46,996 
Loss on available-for-sale securities, net
3,010 — 3,010 
Other comprehensive income (loss), before income taxes(168,967)46,996 (121,971)
Federal and state income taxes(40,735)10,794 (29,941)
Other comprehensive income (loss), net of income taxes(128,232)36,202 (92,030)
Balance, September 30, 2023$(792,850)$(136,135)$(928,985)
Balance, Dec. 31, 2023$(473,212)$(125,888)$(599,100)
Net change in unrealized gain (loss)
263,436  263,436 
Reclassification adjustments included in earnings:
Interest revenue, Investment securities 35,641 35,641 
Loss on available-for-sale securities, net
45,828  45,828 
Other comprehensive income (loss), before income taxes309,264 35,641 344,905 
Federal and state income taxes72,711 8,383 81,094 
Other comprehensive income (loss), net of income taxes236,553 27,258 263,811 
Balance, September 30, 2024$(236,659)$(98,630)$(335,289)