Restructuring Charges, Net (Accrued Restructuring Charges Activity) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 24 Months Ended 36 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period $ 221 $ 416    
Charges 33 1,686    
Payments (186) (1,861)    
Non-cash adjustments   (20)    
Balance at ending of period 68 221 221 68
Total charges to date     3,945 3,979
2012 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period 71      
Charges 54 1,685    
Payments (105) (1,597)    
Non-cash adjustments   (17)    
Balance at ending of period 20 71 71 20
Total charges to date     1,606 1,660
2011 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period 150 416    
Charges (21) 1    
Payments (81) (264)    
Non-cash adjustments   (3)    
Balance at ending of period 48 150 150 48
Total charges to date     2,339 2,319
Employee Severance And Related Expenses [Member] | 2012 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period 27      
Charges 54 1,595    
Payments (81) (1,488)    
Non-cash adjustments   (80)    
Balance at ending of period   27 27  
Total charges to date     1,531 1,585
Employee Severance And Related Expenses [Member] | 2011 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period   39    
Charges   1    
Payments   (40)    
Total charges to date     1,450 1,452
Lease Obligation And Other Exit Costs [Member] | 2012 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period 44      
Charges   90    
Payments (24) (109)    
Non-cash adjustments   63    
Balance at ending of period 20 44 44 20
Total charges to date     75 75
Lease Obligation And Other Exit Costs [Member] | 2011 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Balance at beginning of period 150 377    
Charges (21)      
Payments (81) (224)    
Non-cash adjustments   (3)    
Balance at ending of period 48 150 150 48
Total charges to date     830 808
Non-Cash Charges [Member] | 2011 Restructuring Plan [Member]
        
Restructuring Cost and Reserve [Line Items]        
Total charges to date     $ 59 $ 59