Deposits and Related Interest (Narratives) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Deposits [Abstract]
Weighted Average Rate Domestic Deposit	0.75%	0.73%
Puerto Rico Cash & Money Market Fund Deposits	$ 108,900,000	$ 93,100,000
Puerto Rico Cash & Money Market Fund Deposits Weighted Average Rate	0.78%	0.78%
Puerto Rico Cash & Money Market Fund Deposits Collateral	83,400,000	67,500,000
Time Deposits, $100,000 or More	681,600,000	845,800,000
Public Fund Time Deposits, $100,000 or more	20,800,000	26,700,000
Public Fund Time Deposits Weighted Average Rate, $100,000 or more	0.53%	0.32%
Public funds deposit	359,200,000	328,600,000
Public Fund Collateral Investments		97,800,000
Public Fund Time Deposits Collateral Commercial Loans	416,000,000	549,000,000
Accrued Interest, Time Deposits	1,300,000
Unamortized deposit discounts	1,100,000
Bank Overdrafts	890,000	1,800,000
Brokered Certificates of Deposits	575,800,000	729,800,000
Brokered Money Market Deposit	93,700,000	98,300,000
Equity indexed option	$ 4,400,000