Loans held-for-sale (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loans held-for-sale [Line Items]
Loans held for sale	$ 24,748,000	$ 53,846,000	$ 24,748,000
Transfer from loans held for sale		1,312,000	14,185,000	78,452,000
Small business loans charged down	6,000,000
Residential [Member]
Loans held-for-sale [Line Items]
Loans held for sale	6,000,000	38,200,000	6,000,000
Charged down its first lien loan portfolio		4,100,000
Transfer from loans held for sale		1,312,000	14,185,000	25,072,000
Small business loans charged down		1,400,000
Commercial Real Estate [Member]
Loans held-for-sale [Line Items]
Loans held for sale		4,200,000
Transfer from loans held for sale				53,380,000
Small Business Loans [Member]
Loans held-for-sale [Line Items]
Loans held for sale	18,800,000	11,400,000	18,800,000
Transfer from loans held for sale			1,300,000
Small business loans charged down			$ 1,100,000