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Accumulated Other Comprehensive Income Comprehensive Income (Loss), Net of Tax (Notes)
 6 Months Ended
Jun. 30, 2012
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income [Text Block]
Accumulated Other Comprehensive Income
The following table presents changes in other comprehensive income for the three and six months ended June 30, 2012 and 2011: 
 
Before-Tax Amount
 
Tax Effect
 
Net of Tax Amount
 
(in thousands)
Three Months Ended June 30, 2012
 
 
 
 
 
Unrealized gain (loss) on securities
$
(16,468
)
 
$
5,764

 
$
(10,704
)
Reclassification adjustment for securities (gains) losses included in net income
(1,537
)
 
538

 
(999
)
Non-credit related unrealized gain (loss) on other-than-temporarily impaired debt securities
(264
)
 
92

 
(172
)
Unrealized gain on derivative financial instruments
52

 
(18
)
 
34

Amortization (accretion) of net unrecognized pension and postretirement items
329

 
(115
)
 
214

Total Other Comprehensive Income (Loss)
$
(17,888
)
 
$
6,261

 
$
(11,627
)
Three Months Ended June 30, 2011
 
 
 
 
 
Unrealized gain (loss) on securities
$
20,694

 
$
(7,243
)
 
$
13,451

Reclassification adjustment for securities (gains) losses included in net income
335

 
(117
)
 
218

Non-credit related unrealized gain (loss) on other-than-temporarily impaired debt securities
738

 
(258
)
 
480

Unrealized gain on derivative financial instruments
52

 
(18
)
 
34

Amortization (accretion) of net unrecognized pension and postretirement items
(19
)
 
7

 
(12
)
Total Other Comprehensive Income (Loss)
$
21,800

 
$
(7,629
)
 
$
14,171

Six Months Ended June 30, 2012
 
 
 
 
 
Unrealized gain (loss) on securities
$
(9,415
)
 
$
3,295

 
$
(6,120
)
Reclassification adjustment for securities (gains) losses included in net income
(2,788
)
 
976

 
(1,812
)
Non-credit related unrealized gain (loss) on other-than-temporarily impaired debt securities
(57
)
 
20

 
(37
)
Unrealized gain on derivative financial instruments
104

 
(36
)
 
68

Amortization (accretion) of net unrecognized pension and postretirement items
659

 
(231
)
 
428

Total Other Comprehensive Income (Loss)
$
(11,497
)
 
$
4,024

 
$
(7,473
)
Six Months Ended June 30, 2011
 
 
 
 
 
Unrealized gain (loss) on securities
$
26,183

 
$
(9,164
)
 
$
17,019

Reclassification adjustment for securities (gains) losses included in net income
(1,949
)
 
682

 
(1,267
)
Non-credit related unrealized gain (loss) on other-than-temporarily impaired debt securities
1,121

 
(392
)
 
729

Unrealized gain on derivative financial instruments
104

 
(36
)
 
68

Amortization (accretion) of net unrecognized pension and postretirement items
(37
)
 
13

 
(24
)
Total Other Comprehensive Income (Loss)
$
25,422

 
$
(8,897
)
 
$
16,525


The following table presents changes in each component of accumulated other comprehensive income, net of tax, for the three and six months ended June 30, 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 June 30, 2012
 
 
 
 
 
 
 
 
 
Balance at March 31, 2012
$
30,825

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

Current-period other comprehensive income (loss)
(11,703
)
 
(172
)
 
214

 
34

 
(11,627
)
Balance at June 30, 2012
$
19,122

 
$
(1,048
)
 
$
(14,706
)
 
$
(2,886
)
 
$
482

Three months ended June 30, 2011

 

 

 

 

Balance at March 31, 2011
$
23,791

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

Current-period other comprehensive income (loss)
13,436

 
713

 
(12
)
 
34

 
14,171

Balance at June 30, 2011
$
37,227

 
$
(747
)
 
$
(4,438
)
 
$
(3,022
)
 
$
29,020

 
 
 
 
 
 
 
 
 
 
Six months ended June 30, 2012
 
 
 
 
 
 
 
 
 
Balance at December 31, 2011
$
27,054

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

Current-period other comprehensive income (loss)
(7,932
)
 
(37
)
 
428

 
68

 
(7,473
)
Balance at June 30, 2012
$
19,122

 
$
(1,048
)
 
$
(14,706
)
 
$
(2,886
)
 
$
482

Six months ended June 30, 2011
 
 
 
 
 
 
 
 
 
Balance at December 31, 2010
$
22,354

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

Current-period other comprehensive income (loss)
14,873

 
1,608

 
(24
)
 
68

 
16,525

Balance at June 30, 2011
$
37,227

 
$
(747
)
 
$
(4,438
)
 
$
(3,022
)
 
$
29,020