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Accumulated Other Comprehensive Loss
 9 Months Ended
Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss included the following as of September 30, 2012, December 31, 2011, and September 30, 2011:
 
 
September 30, 2012
 
December 31, 2011
 
September 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
$
42,907

 
$
17,019

 
$
25,888

 
$
26,565

 
$
10,450

 
$
16,115

 
$
28,830

 
$
11,340

 
$
17,490

Funded status of defined benefit plan
(116,887
)
 
(45,773
)
 
(71,114
)
 
(125,255
)
 
(49,049
)
 
(76,206
)
 
(68,752
)
 
(26,923
)
 
(41,829
)
Unrealized loss on cash flow hedge
(11,170
)
 
(4,410
)
 
(6,760
)
 
(10,714
)
 
(4,231
)
 
(6,483
)
 
(13,531
)
 
(5,343
)
 
(8,188
)
Total
$
(85,150
)
 
$
(33,164
)
 
$
(51,986
)
 
$
(109,404
)
 
$
(42,830
)
 
$
(66,574
)
 
$
(53,453
)
 
$
(20,926
)
 
$
(32,527
)