(Narrative) Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Servicing Assets at Fair Value [Line Items]
Guarantor Obligations, Short-Term	$ 145,800		$ 145,800
Mortgage Servicing Rights	$ 20,635	$ 22,150	$ 20,635	$ 22,150	$ 21,490	$ 22,011	$ 22,469	$ 22,760
Minimum percentage adverse change in prepayment speed	10.00%
Maximum percentage adverse change in prepayment speed	25.00%
Percentage of variation in prepayment speed	10.00%		10.00%
Residential Mortgages
Servicing Assets at Fair Value [Line Items]
Loan servicing fees	$ 1,600	1,600	$ 3,200	3,300
Servicing Asset	2,500,000	$ 2,700,000	2,500,000	$ 2,700,000
Manufactured Housing
Servicing Assets at Fair Value [Line Items]
Financing Receivable, Loans Sold to Third Party Investors	$ 3,700		$ 3,700