Shareholders' Equity - Schedule of Minimum Required Capital Amounts and Ratios for Well Capitalized Institutions and The Actual Capital Amounts and Ratios for The Company and The Bank (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,414,242	$ 1,316,995	$ 1,611,611	$ 1,374,507
Well Capitalized Minimum Common Equity Tier One Ratio (as a percent)	6.50%	6.50%
Well Capitalized Minimum Tier 1 Capital Ratio (as a percent)	0.080	0.080
Well Capitalized Minimum Total Capital Ratio (as a percent)	0.100	0.100
Well Capitalized Minimum Tier 1 Leverage Ratio (as a percent)	0.050	0.050
Parent [Member]
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,238,756	$ 1,141,507
Common Equity Tier One Capital	1,611,645	1,554,741
Tier 1 Capital	1,787,132	1,730,228
Total Capital	$ 1,935,532	$ 1,875,430
Common Equity Tier One Capital Ratio	11.33%	10.92%
Tier 1 Capital Ratio (as a percent)	0.1256	0.1215
Total Capital Ratio (as a percent)	0.1360	0.1317
Tier 1 Leverage Ratio (as a percent)	0.0751	0.0737
Subsidiaries [Member]
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,369,733	$ 1,279,736
Common Equity Tier One Capital	1,754,222	1,704,570
Tier 1 Capital	1,754,222	1,704,570
Total Capital	$ 1,902,622	$ 1,849,772
Common Equity Tier One Capital Ratio	12.33%	11.98%
Tier 1 Capital Ratio (as a percent)	0.1233	0.1198
Total Capital Ratio (as a percent)	0.1338	0.1300
Tier 1 Leverage Ratio (as a percent)	0.0738	0.0727