Loans Held-for-Sale (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Loans on Real Estate [Line Items]
Loans held-for-sale, net	$ 7,640,000	$ 7,375,000
Net gain (loss) on sales of loans	1,763,000	6,880,000	7,590,000
Non-performing loans held-for-sale, net
Mortgage Loans on Real Estate [Line Items]
Loans held-for-sale, net	153,000	791,000
Sale of delinquent and non-performing mortgage loans, net of charge-offs, amount	4,900,000	19,400,000	22,000,000
Charge-offs on delinquent and non-performing mortgage loans sold	517,000	5,200,000	11,500,000
Net gain (loss) on sales of loans	(892,000)	122,000	1,300,000
Net lower of cost or market write-downs		$ 87,000	$ 272,000
Non-performing multi family mortgage loans
Mortgage Loans on Real Estate [Line Items]
Number of non-performing loans held-for-sale	1