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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2013
Equity [Abstract]  
Components of Accumulated Other Comprehensive Income
(Dollars in thousands)
December 31, 2013
 
December 31, 2012
Unrealized gains on available-for-sale securities
$
13,888

 
95,328

Tax effect
(5,403
)
 
(37,083
)
Net of tax amount
8,485

 
58,245

Unrealized gains (losses) on derivatives used for cash flow hedges
1,896

 
(16,832
)
Tax effect
(736
)
 
6,549

Net of tax amount
1,160

 
(10,283
)
Total accumulated other comprehensive income
$
9,645

 
47,962