Mortgage Banking Activities, Loans Sold With Recourse (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Residential Mortgage Loans Sold With Recourse [Abstract]
Carrying amount of residential mortgage loans sold and subject to recourse	$ 174,000,000	$ 187,000,000	$ 180,000,000
Percentage of loans sold with recourse and either more than 90 days past due or in bankruptcy or foreclosure (in hundredths)	3.00%
Principal balance of loans sold with recourse and either 90 days or more past due or in bankruptcy or foreclosure	5,400,000
Percentage of loans sold with recourse and 30 to 89 days past due (in hundredths)	3.00%
Principal balance of loans sold with recourse and 30 to 89 days past due	6,000,000
Activity in the allowance for losses on loans sold with recourse [Roll forward]
Beginning balance	7,299,000	9,562,000
Provision for recourse losses	170,000	(16,000)
Loans charged off, net	(448,000)	(480,000)
Ending balance	7,021,000	9,066,000
Residential Mortgage Loan Repurchase and Servicing Losses [Abstract]
Number of mortgages purchased under repurchase agreement with government sponsored entities.	12
Purchase price of loans purchased under repurchase agreement with government sponsored entities	2,400,000
Number of loans sold under standard representations and warranties indemnified	4
Number of unresolved deficiency requests	213	647
Aggregate outstanding principal balance subject to unresolved deficiency requests	17,979,000	81,909,000
Unpaid principal balance of mortgage loans subject to indemnification by the Company	4,212,000	1,561,000
Activity in accrual for mortgage losses [Rollforward]
Beginning balance	11,868,000	12,716,000
Provision for losses	(788,000)	203,000
Charge-offs, net	60,000	(1,299,000)
Ending balance	$ 11,140,000	$ 11,620,000