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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Changes in Capital Surplus
Changes in "Capital surplus" are primarily a result of stock compensation:
 
Quarter ended June 30,
 
Six months ended June 30,
(In thousands)
2013
 
2012
 
2013
 
2012
Stock-based compensation
$
1,876

 
$
2,744

 
$
3,828

 
$
5,398

Shares withheld for taxes
(2
)
 
(92
)
 
(332
)
 
(220
)
Capital surplus increase
$
1,874

 
$
2,652

 
$
3,496

 
$
5,178