Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financial assets:
Securities available for sale	$ 2,512,650	$ 831,013
Derivative instruments	22,128	34,505
Financial liabilities:
Derivative instruments:	18,503	28,550
Recurring
Financial assets:
Derivative instruments	49,432	38,954
Mortgage loans held for sale in loans held for sale	286,779	246,171
Total financial assets	2,848,861	1,116,138
Financial liabilities:
Derivative instruments:	44,174	32,268
Recurring | Securities available for sale
Financial assets:
Securities available for sale	2,512,650	831,013
Recurring | Level 1
Financial assets:
Derivative instruments	0	0
Mortgage loans held for sale in loans held for sale	0	0
Total financial assets	0	0
Financial liabilities:
Derivative instruments:	0	0
Recurring | Level 1 | Securities available for sale
Financial assets:
Securities available for sale	0	0
Recurring | Level 2
Financial assets:
Derivative instruments	49,432	38,954
Mortgage loans held for sale in loans held for sale	286,779	246,171
Total financial assets	2,848,861	1,116,138
Financial liabilities:
Derivative instruments:	44,174	32,268
Recurring | Level 2 | Securities available for sale
Financial assets:
Securities available for sale	2,512,650	831,013
Recurring | Level 3
Financial assets:
Derivative instruments	0	0
Mortgage loans held for sale in loans held for sale	0	0
Total financial assets	0	0
Financial liabilities:
Derivative instruments:	0	0
Recurring | Level 3 | Securities available for sale
Financial assets:
Securities available for sale	$ 0	$ 0