Commitments and Contingencies (Schedule of Changes in Repurchase Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	$ 7,776	$ 9,317	$ 8,374	$ 9,851
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	363	164	(39)	2,757
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	(361)	(459)	(557)	(3,586)
Financing Receivable, Repurchase Reserve, Ending Balance	7,778	9,022	7,778	9,022
Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Repurchase Reserve, Assumed Obligation	6,650		6,650
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	6,650	8,200	7,250	8,737
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	363	164	(39)	2,757
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	(363)	(464)	(561)	(3,594)
Financing Receivable, Repurchase Reserve, Ending Balance	6,650	7,900	6,650	7,900
Manufactured Housing
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	1,126	1,117	1,124	1,114
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	2	0	4	0
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	0	5	0	8
Financing Receivable, Repurchase Reserve, Ending Balance	$ 1,128	$ 1,122	$ 1,128	$ 1,122