Commitments and Contingencies (Schedule of Changes in Repurchase Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	$ 7,778	$ 9,022	$ 8,374	$ 9,851
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	123	250	84	3,015
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	(322)	(600)	(879)	(4,194)
Financing Receivable, Repurchase Reserve, Ending Balance	7,579	8,672	7,579	8,672
Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Repurchase Reserve, Assumed Obligation	6,450	7,550	6,450	7,550
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	6,650	7,900	7,250	8,737
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	122	250	83	3,007
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	(322)	(600)	(883)	(4,194)
Financing Receivable, Repurchase Reserve, Ending Balance	6,500	7,550	6,500	7,550
Manufactured Housing
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	1,128	1,122	1,124	1,114
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	0	0	4	8
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	1	0	1	0
Financing Receivable, Repurchase Reserve, Ending Balance	$ 1,129	$ 1,122	$ 1,129	$ 1,122