Mortgage Banking Activities, Loans Sold With Recourse (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Residential Mortgage Loan Repurchase and Servicing Losses [Abstract]
Number of mortgages purchased under repurchase agreement with government sponsored entities.	5
Purchase price of loans purchased under repurchase agreement with government sponsored entities	$ 1,315
Number of loans sold under standard representations and warranties indemnified	4
Number of unresolved deficiency requests	206	211	206	211
Aggregate outstanding principal balance subject to unresolved deficiency requests	$ 13,370	$ 15,920	$ 13,370	$ 15,920
Unpaid principal balance subject to indemnification by the Company	5,074	5,519	5,074	5,519
Activity in accrual for mortgage losses [Rollforward]
Beginning balance	2,587	2,974	2,788	3,359
Provision for losses	(895)	368	(1,094)	250
Charge-offs, net	(45)	(89)	(47)	(356)
Ending balance	$ 1,647	$ 3,253	$ 1,647	$ 3,253