Commitments and Contingencies (Schedule of Changes in Repurchase Reserve) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	$ 2,667	$ 1,743
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	(56)	(206)
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	127	141
Financing Receivable, Repurchase Reserve, Ending Balance	2,738	1,678
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	1,500	470
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	(56)	(206)
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	156	136
Financing Receivable, Repurchase Reserve, Ending Balance	1,600	400
Manufactured Housing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Financing Receivable, Repurchase Reserve, Beginning Balance	1,167	1,273
Financing Receivable, Repurchase Reserve Net Realized Gains (Losses)	0	0
Financing Receivable, Repurchase Reserve, Period Increase (Decrease)	(29)	5
Financing Receivable, Repurchase Reserve, Ending Balance	$ 1,138	$ 1,278