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Stockholders' Equity
 3 Months Ended
Mar. 31, 2023
Equity [Abstract]  
Stockholders' Equity
Note 7    Stockholders’ Equity
Accumulated Other Comprehensive Income
Changes in other comprehensive income are summarized as follows for the periods indicated (in thousands):
Three Months Ended March 31,
 20232022
 Before TaxTax EffectNet of TaxBefore TaxTax EffectNet of Tax
Unrealized gains (losses) on investment securities available for sale:
   
Net unrealized holding gains (losses) arising during the period$101,265 $(26,329)$74,936 $(236,434)$61,454 $(174,980)
Amounts reclassified to gain on investment securities available for sale, net(752)196 (556)(2,673)695 (1,978)
Net change in unrealized gains (losses) on investment securities available for sale
100,513 (26,133)74,380 (239,107)62,149 (176,958)
Unrealized gains (losses) on derivative instruments:
Net unrealized holding gains (losses) arising during the period(2,926)761 (2,165)41,963 (10,784)31,179 
Amounts reclassified to interest expense on deposits(5,049)1,313 (3,736)722 (188)534 
Amounts reclassified to interest expense on borrowings
(7,497)1,949 (5,548)4,710 (1,224)3,486 
Amounts reclassified to interest income on loans392 (102)290 — — — 
Net change in unrealized gains (losses) on derivative instruments(15,080)3,921 (11,159)47,395 (12,196)35,199 
Other comprehensive income (loss)$85,433 $(22,212)$63,221 $(191,712)$49,953 $(141,759)

The categories of AOCI and changes therein are presented below for the periods indicated (in thousands):
Unrealized Gain (Loss) on
Investment Securities
Available for Sale		Unrealized Gain (Loss)
on Derivative
Instruments		Total
Balance at December 31, 2022
$(498,911)$61,006 $(437,905)
Other comprehensive income (loss)74,380 (11,159)63,221 
Balance at March 31, 2023$(424,531)$49,847 $(374,684)
Balance at December 31, 2021
$2,859 $(18,799)$(15,940)
Other comprehensive income (loss)(176,958)35,199 (141,759)
Balance at March 31, 2022$(174,099)$16,400 $(157,699)