Borrowings (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Borrowings	$ 363,672	$ 113,726
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Non-Recourse Debt	3,672	7,126
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	6.26%	0.00%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	0.07%	0.00%
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	360,000
Federal Home Loan Bank of San Francisco [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	$ 0	$ 106,600