Commitments and Contingencies (Narratives) (Details) (USD $)	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Allowance for unfunded lending commitments	$ 8,100,000		$ 5,400,000	$ 5,700,000
Short-term guarantees	130,000,000
Allowance for loan loss associated with loans sold with recourse	8,400,000		2,700,000	2,000,000
Financing Receivable, Repurchase Reserve	8,393,000	2,738,000	2,667,000	2,013,000	1,678,000	1,743,000
Residential mortgages
Loss Contingencies [Line Items]
Financing Receivable, Loans Sold to Third Party Investors	45,300,000		32,500,000	17,800,000
Financing Receivable, Repurchase Reserve	7,287,000	1,600,000	1,500,000	750,000	400,000	470,000
Manufactured Housing [Member]
Loss Contingencies [Line Items]
Financing Receivable, Loans Sold to Third Party Investors	8,200,000		8,200,000	10,700,000
Financing Receivable, Repurchase Reserve	$ 1,106,000	$ 1,138,000	$ 1,167,000	$ 1,263,000	$ 1,278,000	$ 1,273,000