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Regulatory Matters (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |
Cash dividends paid to parent Company by consolidated subsidiaries | $ 52,000,000 | $ 145,000,000 | $ 253,000,000
Amount available to be paid as dividends without prior regulatory approval | $ 703,800,000 |  |
Minimum ratio of qualifying total capital to risk-weighted assets | 0.080 |  |
Tier 1 common equity capital required for capital adequacy to risk weighted assets | 0.0450 |  |
Tier 1 risk based capital required for capital adequacy to risk weighted assets | 0.060 |  |
Tier 1 leverage capital required for capital adequacy to average assets | 0.040 |  |
Ratio required for banks to be well capitalized, total capital to risk-weighted assets | 0.100 |  |
Ratio required for banks to be well capitalized, Tier 1 capital to risk-weighted assets | 0.080 |  |
Ratio required for banks to be well capitalized, Common Equity Tier 1 capital risk weighted assets | 0.065 |  |
Ratio required for banks to be well capitalized, Tier 1 leverage ratio | 0.050 |  |
Federal Reserve Bank |  |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |
Cash reserve requirement | $ 0 | $ 0 | $ 0

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