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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2012
Equity [Abstract]  
Components of accumulated other comprehensive loss, net of related tax benefit/expense
The components of accumulated other comprehensive loss, net of related tax benefit/expense, were as follows:
 
 
December 31,
 
 
2012
 
2011
 
2010
 
 
(In thousands)
Net unrealized gains on investment securities — available-for-sale, net of related tax expense of $2,301 at December 31, 2012, $1,796 at December 31, 2011 and $1,786 at December 31, 2010
 
$
4,274

 
$
3,336

 
$
3,317

Pension and other postretirement benefits adjustment, net of related tax benefit of $19,058 at December 31, 2012, $15,435 at December 31, 2011 and $9,384 at December 31, 2010
 
(35,393
)
 
(28,665
)
 
(17,428
)
Accumulated other comprehensive loss
 
$
(31,119
)
 
$
(25,329
)
 
$
(14,111
)