v2.4.0.6
Regulatory Capital Requirements (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital, Actual Amount $ 636,559 $ 623,526
Total Capital (to risk-weighted assets), Ratio 21.05% 24.47%
Total Capital For Capital Adequacy Purposes, Amount 241,955 203,871
Total Capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Tier 1 Capital, Actual Amount 598,485 591,263
Tier 1 Capital (to risk-weighted assets), Ratio 19.79% 23.20%
Tier 1 Capital For Capital Adequacy Purposes, Amount 120,978 101,936
Tier 1 Capital (to risk-weighted assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier 1 Capital, Actual Amount 598,485 591,263
Tier 1 Capital (to average assets), Ratio 12.96% 13.99%
Tier 1 Capital For Capital Adequacy Purposes, Amount 184,780 169,062
Tier 1 Capital (to average assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Parent Company [Member]
    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total Capital, Actual Amount 561,216 463,587
Total Capital (to risk-weighted assets), Ratio 18.55% 18.20%
Total Capital For Capital Adequacy Purposes, Amount 242,028 203,789
Total Capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Total Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount 302,535 254,736
Total Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision 10.00% 10.00%
Tier 1 Capital, Actual Amount 523,131 431,337
Tier 1 Capital (to risk-weighted assets), Ratio 17.29% 16.93%
Tier 1 Capital For Capital Adequacy Purposes, Amount 121,014 101,894
Tier 1 Capital (to risk-weighted assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount 181,521 152,841
Tier 1 Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision, Ratio 6.00% 6.00%
Tier 1 Capital, Actual Amount 523,131 431,337
Tier 1 Capital (to average assets), Ratio 11.45% 10.33%
Tier 1 Capital For Capital Adequacy Purposes, Amount 182,747 166,961
Tier 1 Capital (to average assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Provision, Amount $ 228,434 $ 208,702
Tier 1 Capital (to average assets) To Be Well Capitalized Under Prompt Corrective Provision, Ratio 5.00% 5.00%