Mortgage Banking Activities, Loans Sold With Recourse (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Residential mortgage loans sold with recourse [Abstract]
Carrying amount of residential mortgage loans sold and subject to recourse	$ 191,000,000	$ 227,000,000
Percentage of loans sold with recourse and either more than 90 days past due or in bankruptcy of foreclosure (in hundreths)	4.00%
Principal balance of loans sold with recourse and either 90 days or more past due or in bankruptcy or foreclosure	6,700,000
Percentage of loans sold with recourse and 30 to 89 days past due (in hundreths)	6.00%
Principal balance of loans sold with recourse and 30 to 89 days past due	12,000,000
Activity in the allowance for losses on loans sold with recourse [Abstract]
Beginning balance	11,359,000	18,683,000	16,667,000
Provision for recourse losses	565,000	(1,891,000)	8,611,000
Loans charged off, net	(2,883,000)	(5,433,000)	(6,595,000)
Ending balance	9,041,000	11,359,000	18,683,000
Residential Mortgage Loans Subject to Repurchase Under Standard Representations and Warranties [Abstract]
Number of mortgages purchased under repurchase agreement with US government sponsored entities	19
Purchase price of loans purchased under repurchase agreement with government sponsored entities	2,100,000
Losses incurred on actual repurchased loans from governmental sponsored entities with warranties	333,000
Number of loans sold under standard representation and warranties indemnified	14
Losses on mortgage loans indemnified during period	453,000
Number of loans with unresolved deficiency requests	578	389
Principal balance of loans with unresolved deficiency requests	69,288,000	44,831,000
Unpaid principal balance of mortgage loans subject to indemnification under standard representations and warranties	3,200,000	1,233,000
Accrual for credit losses for loan repurchased or indemnified under standard representation and warranties	$ 8,845,000	$ 5,291,000