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Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) Net of Tax (Tables)
 3 Months Ended
Mar. 31, 2015
Statement of Comprehensive Income [Abstract]  
Comprehensive Income (Loss) [Table Text Block]
Other comprehensive income components, net of tax, are shown in the following table for the three-month periods ended March 31, 2015 and 2014:
Three months ended March 31,
(in thousands)
 
Changes in pension plan assets and benefit obligations
 
Unrealized gains and losses on available for sale securities
 
Total
Beginning balance at December 31, 2014
 
$
(14,865
)
 
$
1,257

 
$
(13,608
)
 
Other comprehensive income before reclassifications
 
—

 
7,859

 
7,859

 
Amounts reclassified from accumulated other comprehensive income
 
—

 
—

 
—

Net current period other comprehensive income
 
—

 
7,859

 
7,859

Ending balance at March 31, 2015
 
$
(14,865
)
 
$
9,116

 
$
(5,749
)
 
 
 
 
 
 
 
 
Beginning balance at December 31, 2013
 
$
(5,598
)
 
$
(29,821
)
 
$
(35,419
)
 
Other comprehensive income before reclassifications
 
—

 
10,941

 
10,941

 
Amounts reclassified from accumulated other comprehensive income
 
—

 
—

 
—

Net current period other comprehensive income
 
—

 
10,941

 
10,941

Ending balance at March 31, 2014
 
$
(5,598
)
 
$
(18,880
)
 
$
(24,478
)