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, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,316,995	$ 1,611,611	$ 1,374,507	$ 1,286,832
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	$ 1,141,507	$ 1,436,124
Common Equity Tier One Capital	1,554,741	1,483,455
Tier 1 Capital	1,730,228	1,658,942
Total Capital	$ 1,875,430	$ 1,811,943
Common Equity Tier One Capital Ratio	10.92%	12.12%
Tier 1 Capital Ratio (as a percent)	0.1215	0.1356
Total Capital Ratio (as a percent)	0.1317	0.1481
Tier 1 Leverage Ratio (as a percent)	0.0737	0.0732
Subsidiaries [Member]
Minimum required capital amounts and ratios for well capitalized institutions and the actual capital amounts [Line Items]
Common Shareholders’ Equity	$ 1,279,736	$ 1,586,473
Common Equity Tier One Capital	1,704,570	1,645,405
Tier 1 Capital	1,704,570	1,645,405
Total Capital	$ 1,849,772	$ 1,798,190
Common Equity Tier One Capital Ratio	11.98%	13.47%
Tier 1 Capital Ratio (as a percent)	0.1198	0.1347
Total Capital Ratio (as a percent)	0.1300	0.1472
Tier 1 Leverage Ratio (as a percent)	0.0727	0.0726