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Accumulated Other Comprehensive Income Comprehensive Income (Loss), Net of Tax (Notes)
 3 Months Ended
Mar. 31, 2012
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income [Text Block]
Accumulated Other Comprehensive Income
The following tables present changes in each component of accumulated other comprehensive income for the three months ended March 31, 2012 and 2011: 
 
Unrealized Gains on Investment Securities Not Other-Than-Temporarily Impaired
 
Unrealized Non-Credit Losses on Other-Than-Temporarily Impaired Debt Securities
 
Unrecognized Pension and Postretirement Plan Items
 
Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps
 
Total
 
(in thousands)
Three months ended March 31, 2012
 
 
 
 
 
 
 
 
 
Balance at December 31, 2011
$
27,054

 
$
(1,011
)
 
$
(15,134
)
 
$
(2,954
)
 
$
7,955

Current-period other comprehensive income
3,771

 
135

 
214

 
34

 
4,154

Balance at March 31, 2012
$
30,825

 
$
(876
)
 
$
(14,920
)
 
$
(2,920
)
 
$
12,109

Three months ended March 31, 2011

 

 

 

 

Balance at December 31, 2010
$
22,354

 
$
(2,355
)
 
$
(4,414
)
 
$
(3,090
)
 
$
12,495

Current-period other comprehensive income (loss)
1,437

 
895

 
(12
)
 
34

 
2,354

Balance at March 31, 2011
$
23,791

 
$
(1,460
)
 
$
(4,426
)
 
$
(3,056
)
 
$
14,849