Loan Securitization/Sale Activities (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Loan Transfer Activities
Par value of loans held-for-sale, sold during period	$ 348,000,000		$ 637,400,000
Fair value of loans held-for-sale, sold during period	364,300,000		666,800,000
Amount repaid for outstanding balance	261,000,000		478,100,000
Loan Transfers Accounted for as Secured Borrowings
Proceeds				95,000,000
Securitizations | Real Estate Investment Lending
Loan Transfers Accounted for as Sales
Face Amount	56,975,000	52,849,000	204,859,000	97,380,000
Proceeds	56,124,000	52,859,000	202,524,000	97,490,000
Loan Transfers Accounted for as Secured Borrowings
Face Amount		95,000		95,000
Proceeds		$ 95,000		$ 95,000