Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Cash-Settleable RSU Awards) (Details)

v2.4.0.8
Employee Benefit Plans (Cash-Settleable RSU Awards) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Payments to settle vested liability share-based awards $ 239 $ 3,383 $ 0
Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 1,577    
Market-based Cash-settleable RSU Awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded 100.00% 150.00%  
Cash-Settleable Awards, Base Units, Actual Units Vested During Period 260 364  
Payments to settle vested liability share-based awards 1,669 2,626  
Non-Market Based Cash-settleable RSU Awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Actual Units Vested During Period 65 143  
Payments to settle vested liability share-based awards $ 239 $ 763  
Potential Minimum Units at Vesting [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded 0.00%    
Potential Minimum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 263    
Potential Maximum Units at Vesting [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded 200.00%    
Potential Maximum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 2,891    
Vesting in 2014 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 510    
Vesting in 2014 [Member] | Potential Minimum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 45    
Vesting in 2014 [Member] | Potential Maximum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 975    
Vesting in 2015 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 909    
Vesting in 2015 [Member] | Potential Minimum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 60    
Vesting in 2015 [Member] | Potential Maximum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 1,758    
Vesting in 2016 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 66    
Vesting in 2016 [Member] | Potential Minimum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 66    
Vesting in 2016 [Member] | Potential Maximum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 66    
Other [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 92    
Other [Member] | Potential Minimum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 92    
Other [Member] | Potential Maximum Units at Vesting [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 92