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Note 22 - Regulatory Matters (Details) - Capital and Leverage Ratios (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Company [Member]
   
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier I Capital (to risk- weighted assets) $ 1,288,892 $ 1,426,566
Tier I Capital (to risk- weighted assets) 15.04% 17.36%
Tier I Capital minimum requirement 342,899 328,713
Tier I Capital minimum requirement 4.00% 4.00%
Excess 945,993 1,097,853
Excess 11.04% 13.36%
Total Capital (to risk- weighted assets) 1,401,319 1,571,060
Total Capital (to risk- weighted assets) 16.35% 19.12%
Total Capital minimum requirement 685,799 657,426
Total Capital minimum requirement 8.00% 8.00%
Excess 715,520 913,634
Excess 8.35% 11.12%
Tier I Capital (to average assets) Leverage ratio 1,288,892 1,426,566
Tier I Capital (to average assets) Leverage ratio 12.48% 13.82%
Minimum leverage requirement 413,158 412,844
Minimum leverage requirement 4.00% 4.00%
Excess 875,734 1,013,722
Excess 8.48% 9.82%
Total average assets (1) 10,328,952 [1] 10,321,104 [1]
Risk-weighted assets 8,572,487 8,217,821
Bank [Member]
   
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier I Capital (to risk- weighted assets) 1,244,480 1,259,005
Tier I Capital (to risk- weighted assets) 14.53% 15.33%
Tier I Capital minimum requirement 342,701 328,440
Tier I Capital minimum requirement 4.00% 4.00%
Excess 901,779 930,565
Excess 10.53% 11.33%
Total Capital (to risk- weighted assets) 1,352,415 1,402,691
Total Capital (to risk- weighted assets) 15.79% 17.08%
Total Capital minimum requirement 685,402 656,880
Total Capital minimum requirement 8.00% 8.00%
Excess 667,013 745,811
Excess 7.79% 9.08%
Tier I Capital (to average assets) Leverage ratio 1,244,480 1,259,005
Tier I Capital (to average assets) Leverage ratio 12.06% 12.22%
Minimum leverage requirement 412,815 412,272
Minimum leverage requirement 4.00% 4.00%
Excess 831,665 846,733
Excess 8.06% 8.22%
Total average assets (1) 10,320,368 [1] 10,306,790 [1]
Risk-weighted assets $ 8,567,523 $ 8,211,004
[1] Average assets represent average balances for the fourth quarter of each year presented.