Annual report pursuant to Section 13 and 15(d)

Non-controlling Interests (Summary of the impact of the consolidated VIE) (Details)

v2.4.0.6
Non-controlling Interests (Summary of the impact of the consolidated VIE) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Variable Interest Entity [Line Items]    
Variable Interest Entity, Classification of Carrying Amount, Assets $ 32,955 $ 16,621
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity 32,955 16,621
Restricted Cash [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Classification of Carrying Amount, Assets 22,348 15,910
Construction in Progress [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Classification of Carrying Amount, Assets 10,607 711
Noncontrolling Interest [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity 32,258 16,308
Retained Earnings [Member]
    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity $ 697 $ 313