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Other Comprehensive Income (Loss) (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Class of Stock [Line Items]        
Accumulated other comprehensive income $ 41,258 $ (4,101) $ (21,093) $ (57,158)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
       
Class of Stock [Line Items]        
Accumulated other comprehensive income 13,099 13,373 12,524 1,208
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member] | Valuation Allowance of Deferred Tax Assets [Member]
       
Class of Stock [Line Items]        
Accumulated other comprehensive income 12,100      
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
       
Class of Stock [Line Items]        
Accumulated other comprehensive income 28,936 (17,111) (33,617) (58,366)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member] | Valuation Allowance of Deferred Tax Assets [Member]
       
Class of Stock [Line Items]        
Accumulated other comprehensive income $ 13,300