Fair Value - Schedule of Fair Value of Assets Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025
Financial Assets
Debt securities AFS	$ 5,174,602		$ 5,164,567
MSR	26,784	$ 27,374	28,061
Fair Value, Measurements, Recurring
Financial Assets
Derivative financial instruments	26,161		28,620
Loans held for sale	18,565		16,297
Equity securities	13,785		13,923
MSR	26,784		28,061
Financial Liabilities
Derivative financial instruments	21,022		25,483
Fair Value, Measurements, Nonrecurring
Financial Assets
OREO	3,473		4,250
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Debt securities AFS	100		200
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial Assets
Derivative financial instruments	0		0
Loans held for sale	0		0
Equity securities	13,785		13,923
MSR	0		0
Financial Liabilities
Derivative financial instruments	0		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Financial Assets
OREO	0		0
Significant Other Observable Inputs (Level 2)
Financial Assets
Debt securities AFS	5,174,502		5,164,367
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial Assets
Derivative financial instruments	25,838		28,125
Loans held for sale	18,565		16,297
Equity securities	0		0
MSR	0		0
Financial Liabilities
Derivative financial instruments	21,022		25,389
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Financial Assets
OREO	0		0
Significant Unobservable Inputs (Level 3)
Financial Assets
Debt securities AFS	0		0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial Assets
Derivative financial instruments	323		495
Loans held for sale	0		0
Equity securities	0		0
MSR	26,784		28,061
Financial Liabilities
Derivative financial instruments	0		94
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Financial Assets
OREO	$ 3,473		$ 4,250