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Summary of Significant Accounting Policies (Held-to-Maturity Securities) (Details) (Banco Santander Bonds [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Banco Santander Bonds [Member]
 
Schedule of Held-to-maturity Securities [Line Items]  
Cash Received for Held-to-Maturity Securities Sold $ 106,009
Principal Amount of Held-to-maturity Securities Sold 106,169
Held-to-maturity Securities, Sold Security, Realized Gain (Loss) $ (160)