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Commitments, Contingencies and Other Commitments, Contingencies and Other (Table 4) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Cost Basis [Member]
Dec. 31, 2011
Cost Basis [Member]
Dec. 31, 2010
Cost Basis [Member]
Dec. 31, 2012
Accumulated Amortization [Member]
Dec. 31, 2011
Accumulated Amortization [Member]
Dec. 31, 2010
Accumulated Amortization [Member]
Dec. 31, 2009
Accumulated Amortization [Member]
Goodwill [Line Items]                    
Goodwill – net $ 91,559 $ 75,595 $ 38,613              
Goodwill, Gross       76,193 39,211 24,911 598 598 598 598
Goodwill, Acquired During Period       15,964 36,982 14,300        
Goodwill, Gross       $ 92,157 $ 76,193 $ 39,211 $ 598 $ 598 $ 598 $ 598