Mortgage Banking Activities, Loans Sold With Recourse (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Residential Mortgage Loans Sold With Recourse [Abstract]
Carrying amount of residential mortgage loans sold and subject to recourse	$ 162,000	$ 175,000	$ 162,000	$ 175,000	$ 180,000
Percentage of loans sold with recourse and either more than 90 days past due or in bankruptcy or foreclosure (in hundredths)	3.00%		3.00%
Principal balance of loans sold with recourse and either 90 days or more past due or in bankruptcy or foreclosure	$ 5,500		$ 5,500
Percentage of loans sold with recourse and 30 to 89 days past due (in hundredths)	4.00%		4.00%
Principal balance of loans sold with recourse and 30 to 89 days past due	$ 7,000		$ 7,000
Activity in the accrual for losses on loans sold with recourse [Roll forward]
Beginning balance	6,691	8,690	7,299	9,562
Provision for recourse losses	81	93	211	260
Loans charged off, net	(506)	(461)	(1,244)	(1,500)
Ending balance	$ 6,266	$ 8,322	$ 6,266	$ 8,322
Residential Mortgage Loan Repurchase and Servicing Losses [Abstract]
Number of mortgages purchased under repurchase agreement with government sponsored entities.	10
Purchase price of loans purchased under repurchase agreement with government sponsored entities	$ 2,100
Number of loans sold under standard representations and warranties indemnified	0
Number of unresolved deficiency requests	194	184	194	184
Aggregate outstanding principal balance subject to unresolved deficiency requests	$ 14,237	$ 15,548	$ 14,237	$ 15,548
Unpaid principal balance of mortgage loans subject to indemnification by the Company	4,604	4,792	4,604	4,792
Activity in accrual for mortgage losses [Rollforward]
Beginning balance	8,908	12,119	11,868	12,716
Provision for losses	(52)	1,122	(3,056)	2,475
Charge-offs, net	(1,262)	(3,486)	(1,218)	(5,436)
Ending balance	$ 7,594	$ 9,755	$ 7,594	$ 9,755