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Accumulated Other Comprehensive Income
 6 Months Ended
Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss) included the following as of June 30, 2012, December 31, 2011 and June 30, 2011:
 
 
June 30, 2012
 
December 31, 2011
 
June 30, 2011
 
Accumulated
other
comprehensive
income (loss)
 
Deferred
tax
expense
(benefit)
 
Accumulated
other
comprehensive
income (loss),
net of tax
 
Accumulated
other
comprehensive
income (loss)
 
Deferred
tax
expense
(benefit)
 
Accumulated
other
comprehensive
income (loss),
net of tax
 
Accumulated
other
comprehensive
income (loss)
 
Deferred
tax
expense
(benefit)
 
Accumulated
other
comprehensive
income (loss),
net of tax
Unrealized gains on investment securities available for sale
$
28,155

 
$
11,082

 
$
17,073

 
$
26,565

 
$
10,450

 
$
16,115

 
$
31,839

 
$
12,528

 
$
19,311

Funded status of defined benefit plan
(119,676
)
 
(46,865
)
 
(72,811
)
 
(125,255
)
 
(49,049
)
 
(76,206
)
 
(70,400
)
 
(27,568
)
 
(42,832
)
Unrealized loss on cash flow hedge
(11,020
)
 
(4,351
)
 
(6,669
)
 
(10,714
)
 
(4,231
)
 
(6,483
)
 
(9,800
)
 
(3,870
)
 
(5,930
)
Total
$
(102,541
)
 
$
(40,134
)
 
$
(62,407
)
 
$
(109,404
)
 
$
(42,830
)
 
$
(66,574
)
 
$
(48,361
)
 
$
(18,910
)
 
$
(29,451
)