Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.6
Employee Benefit Plans (Cash-Settleable RSU Awards) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]      
Payments to settle vested liability share-based awards $ 3,383 $ 0 $ 0
Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 989    
Cash-Settleable Awards, Base Units, Actual Units Vested During Period 144    
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 213    
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 1,632    
Vesting in 2013 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 348    
Vesting in 2013 [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 79    
Vesting in 2013 [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 483    
Vesting in 2014 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 569    
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 62    
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 1,077    
Vesting in 2015 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 72    
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 72    
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 72    
Other [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units, Liability, Outstanding 0    
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 0    
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 0    
Total Base Units Vested During 2012 [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Cash-Settleable Awards, Base Units Issued 364    
Cash-Settleable Awards, Base Units, Actual Units Vested During Period 546    
Payments to settle vested liability share-based awards 2,626    
Total Cash-Settleable (Officer 15%) RSU Vested [Member] | Cash-settleable RSU awards [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Payments to settle vested liability share-based awards $ 757