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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Treasury Stock Activity
The following represents the activity relating to the treasury stock held by the Company during the year ended December 31, 2014:
 
Treasury stock shares
 
Cost
(dollars in thousands)
 
Average cost
per share
Balance outstanding at December 31, 2013
15,873,549

 
$
48,084

 
$
3.03

Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions
1,376,236

 
5,649

 
4.10

Treasury stock reissued
—

 
—

 
—

Purchase of treasury stock
6,257,871

 
26,038

 
4.16

Balance outstanding at December 31, 2014
23,507,656

 
$
79,771

 
$
3.39