Contingencies and Guarantees Contingencies and Guarantees (Schedule of Changes in Repurchase Reserve) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 1,678	$ 2,680	$ 1,743	$ 2,833
Net realized losses	(161)	(17)	(367)	(260)
Net increase to reserve	496	(600)	637	(510)
Balance at end of period	2,013	2,063	2,013	2,063
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	400	465	470	600
Net realized losses	(161)	0	(367)	(225)
Net increase to reserve	511	0	647	90
Balance at end of period	750	465	750	465
Manufactured housing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,278	2,215	1,273	2,233
Net realized losses	0	(17)	0	(35)
Net increase to reserve	(15)	(600)	(10)	(600)
Balance at end of period	$ 1,263	$ 1,598	$ 1,263	$ 1,598