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Regulatory Matters (Details) $ in Thousands | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
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Bank Subsidiary |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common equity Tier 1 capital, Actual Amount | $ 2,014,788 | $ 1,947,914
Common equity Tier 1 capital, Actual Ratio | 0.1181 | 0.1296
Total capital (to risk-weighted assets), Amount |  |
Total capital, Actual | $ 2,152,241 | $ 2,056,675
Tier I capital (to risk-weighted assets), Amount |  |
Tier 1 capital, Actual | 2,014,788 | 1,947,914
Tier I capital (to average assets), Amount |  |
Tier 1 capital, Actual | $ 2,014,788 | $ 1,947,914
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Total capital (to Risk Weighted Assets), Actual | 0.1262 | 0.1368
Total capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0800 | 0.0800
Tier 1 capital (to Risk Weighted Assets), Actual | 0.1181 | 0.1296
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0600 | 0.0600
Tier 1 capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions | 0.0800 | 0.0800
Tier I capital (to average assets), Ratio |  |
Tier I Capital (to Average Assets), Actual (Leverage) | 0.1108 | 0.1120
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage) | 0.0400 | 0.0400
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum | $ 767,682 | $ 676,328
Total capital, Required For Capital Adequacy Purposes | 1,364,769 | 1,202,361
Tier 1 capital, Required For Capital Adequacy Purposes | 1,023,577 | 901,771
Tier 1 capital, Required For Capital Adequacy Purposes | 727,200 | 695,593
Common equity Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | 1,108,875 | 976,919
Total capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions | $ 1,705,961 | $ 1,502,952
Total capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions | 0.1000 | 0.1000
Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions | $ 1,364,769 | $ 1,202,361
Tier 1 capital, Required To Be Well Capitalized Under Prompt Corrective Action Provisions | $ 909,000 | $ 869,491
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage) | 0.0500 | 0.0500
Company |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common equity Tier 1 capital, Actual Amount | $ 1,760,843 | $ 1,657,754
Common equity Tier 1 capital, Actual Ratio | 0.1032 | 0.1103
Total capital (to risk-weighted assets), Amount |  |
Total capital, Actual | $ 2,000,653 | $ 1,867,968
Total capital, Minimum Capital Adequacy With Capital Conservation Buffer | 1,791,862 | 1,578,811
Tier I capital (to risk-weighted assets), Amount |  |
Tier 1 capital, Actual | 1,863,200 | 1,759,207
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer | 1,450,555 | 1,278,085
Tier I capital (to average assets), Amount |  |
Tier 1 capital, Actual | $ 1,863,200 | $ 1,759,207
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Total capital (to Risk Weighted Assets), Actual | 0.1172 | 0.1242
Total capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0800 | 0.0800
Total capital (to Risk Weighted assets), Minimum Capital Adequacy With Capital Conservation Buffer | 10.50% | 10.50%
Tier 1 capital (to Risk Weighted Assets), Actual | 0.1092 | 0.1170
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0600 | 0.0600
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer | 8.50% | 8.50%
Tier I capital (to average assets), Ratio |  |
Tier I Capital (to Average Assets), Actual (Leverage) | 0.1025 | 0.1011
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage) | 0.0400 | 0.0400
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum |  | $ 676,633
Total capital, Required For Capital Adequacy Purposes | $ 1,365,228 | 1,202,903
Tier 1 capital, Required For Capital Adequacy Purposes | 1,023,921 | 902,178
Tier 1 capital, Required For Capital Adequacy Purposes | 727,401 | 695,795
Bank |  |
Total capital (to risk-weighted assets), Amount |  |
Total capital, Minimum Capital Adequacy With Capital Conservation Buffer | 1,791,259 | 1,578,099
Tier I capital (to risk-weighted assets), Amount |  |
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer | $ 1,450,067 | $ 1,277,509
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Total capital (to Risk Weighted assets), Minimum Capital Adequacy With Capital Conservation Buffer | 10.50% | 10.50%
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer | 8.50% | 8.50%
Common Equity Tier 1 | Company |  |
Tier I capital (to risk-weighted assets), Amount |  |
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer | $ 1,194,575 | $ 1,052,540
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0450 | 0.0450
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer | 7.00% | 7.00%
Tier I capital (to average assets), Ratio |  |
Tier 1 capital, Required For Capital Adequacy Purposes | $ 767,941 |
Common Equity Tier 1 | Bank |  |
Tier I capital (to risk-weighted assets), Amount |  |
Tier 1 capital, Minimum Capital Adequacy With Capital Conservation Buffer | $ 1,194,173 | $ 1,052,066
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Tier 1 capital (to Risk Weighted Assets), Minimum Capital Adequacy With Capital Conservation Buffer | 7.00% | 7.00%
Common equity tier 1 capital | Bank Subsidiary |  |
Total capital and Tier I capital (to risk-weighted assets), Ratio |  |
Tier 1 capital (to Risk Weighted Assets), Required For Capital Adequacy Purposes | 0.0450 | 0.0450
Tier 1 capital (to Risk Weighted Assets), Required To Be Well Capitalized Under Prompt Corrective Action Provisions | 0.0650 | 0.0650

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