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Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive loss, net of tax, is comprised of the following items:
 
(In thousands)
June 30,
2012
 
December 31,
2011
Unrealized loss on available-for-sale investments
$
(70
)
 
$
(30
)
Change in minimum postretirement medical obligation
(63
)
 
(69
)
Accumulated other comprehensive loss at end of period
$
(133
)
 
$
(99
)