XML 146 R131.htm IDEA: XBRL DOCUMENT v3.10.0.1
Regulatory Capital Requirements (Group's and the Bank's actual capital amounts and ratios) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Group [Member]    
Capital [Abstract]    
Actual - Total capital $ 990,499 $ 899,258
Actual - Tier 1 capital 928,577 842,133
Actual -Common equity tier 1 capital 811,707 644,804
Actual - Tier 1 leverage capital 928,577 842,133
Minimum Capital - Total Capital 386,977 353,653
Minimum capital - Tier 1 capital 290,233 265,240
Minimum capital - Common equity tier 1 capital 217,675 198,930
Minimum capital - Tier 1 leverage capital 261,125 242,057
Minimum to be well capitalized - Total Capital 483,721 442,067
Minimum to be well capitalized - Tier 1 capital 386,977 353,653
Minimum to be well capitalized - Common equity tier 1 capital 314,419 287,343
Minimum to be well capitalized - Tier 1 leverage $ 326,406 $ 302,571
Risk Based Ratios [Abstract]    
Capital to Risk Weighted Assets 20.48% 20.34%
Tier One Risk Based Capital to Risk Weighted Assets 19.20% 19.05%
Common Equity Tier OneTo Risk Weighted Assets 16.78% 14.59%
Tier One Leverage Capital to Average Assets 14.22% 13.92%
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00% 8.00%
Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets 6.00% 6.00%
Common Equity Tier One Required For Capital Adequacy To Risk Weighted Assets 4.50% 4.50%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00% 4.00%
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00% 10.00%
Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets 8.00% 8.00%
Tier One Risk Common Equity Tier One Required To Be Well Capitalized To Risk Weighted Assets 6.50% 6.50%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00% 5.00%
Bank [Member]    
Capital [Abstract]    
Actual - Total capital $ 949,596 $ 879,648
Actual - Tier 1 capital 887,918 822,776
Actual -Common equity tier 1 capital 887,918 822,776
Actual - Tier 1 leverage capital 887,918 822,776
Minimum Capital - Total Capital 385,992 353,265
Minimum capital - Tier 1 capital 289,494 264,949
Minimum capital - Common equity tier 1 capital 217,120 198,712
Minimum capital - Tier 1 leverage capital 259,547 241,417
Minimum to be well capitalized - Total Capital 482,490 441,581
Minimum to be well capitalized - Tier 1 capital 385,992 353,265
Minimum to be well capitalized - Common equity tier 1 capital 313,618 287,028
Minimum to be well capitalized - Tier 1 leverage $ 324,434 $ 301,771
Risk Based Ratios [Abstract]    
Capital to Risk Weighted Assets 19.68% 19.92%
Tier One Risk Based Capital to Risk Weighted Assets 18.40% 18.63%
Common Equity Tier OneTo Risk Weighted Assets 18.40% 18.63%
Tier One Leverage Capital to Average Assets 13.68% 13.63%
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00% 8.00%
Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets 6.00% 6.00%
Common Equity Tier One Required For Capital Adequacy To Risk Weighted Assets 4.50% 4.50%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00% 4.00%
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00% 10.00%
Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets 8.00% 8.00%
Tier One Risk Common Equity Tier One Required To Be Well Capitalized To Risk Weighted Assets 6.50% 6.50%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00% 5.00%