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Share Based Compensation Share and performance-based compensation expense (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share and performance-based compensation expense [Abstract]      
Performance-based share expense $ 475 $ 27 $ 1,836
Service-based share expense 603 586 692
Stock option expense 0 0 328
Total share-based compensation expense before income tax 1,078 613 2,856
Income tax 0 0 0
Total share-based compensation expense, net of income tax 1,078 613 2,856
Unrecognized compensation expense $ 794    
Weighted average period of expense recognition 0 years 9 months