Regulatory Capital (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Subsidiaries
CET1 risk-based capital
Amount	$ 945,290
Ratio	0.239
Required Minimum	0.070
Well-Capitalized Minimum	0.065
Tier 1 risk-based capital
Amount	$ 945,290
Ratio	0.239
Required Minimum	0.085
Well-Capitalized Minimum	0.080
Total risk-based capital
Amount	$ 968,087
Ratio	0.245
Required Minimum	0.105
Well-Capitalized Minimum	0.100
Tier 1 leverage
Amount	$ 945,290
Ratio	0.326
Required Minimum	0.040
Well-Capitalized Minimum	0.050
Risk-weighted assets	$ 3,952,945
Quarterly adjusted average assets	2,895,231
Parent Company
CET1 risk-based capital
Amount	$ 3,035,247
Ratio	0.302
Required Minimum	0.070
Tier 1 risk-based capital
Amount	$ 3,035,247
Ratio	0.302
Required Minimum	0.085
Total risk-based capital
Amount	$ 3,378,418
Ratio	0.336
Required Minimum	0.105
Tier 1 leverage
Amount	$ 3,035,247
Ratio	0.344
Required Minimum	0.040
Risk-weighted assets	$ 10,057,053
Quarterly adjusted average assets	$ 8,832,284

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Ratio of minimum Common Equity Tier 1 risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework.

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