Variable Interest Entities (Summary of the impact of the consolidated VIE) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Assets	$ 32,955	$ 32,955
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity	32,955	32,955
Restricted Cash [Member] | Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Assets	3,327	22,348
Noncontrolling Interests [Member] | Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity	31,906	32,258
Construction in Progress [Member] | Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Assets	29,628	10,607
Retained Earnings [Member] | Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Liabilities and Equity	1,049	697
Unicom [Member] | Restricted Cash [Member] | Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Classification of Carrying Amount, Assets	$ 8,600	$ 8,600