Fair Value Measurements (Asset Measured At Fair Value On A Nonrecurring Basis) (Details) - Fair Value Measurements Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Noncovered impaired loans at fair value:
Assets fair value, Total	$ 17,596	$ 35,050
Commercial Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	6,053	11,182
One-To-Four Family Residential [Member]
Noncovered impaired loans at fair value:
Loans held for sale	4,386	7,453
Assets fair value, Total	1,593	185
Real Estate Construction [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	207	390
Commercial [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	5,357	9,845
Noncovered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total		2,274
Mortgage Loan Servicing Rights [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total		3,721
Level 2 Inputs [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	4,386	11,174
Level 2 Inputs [Member] | One-To-Four Family Residential [Member]
Noncovered impaired loans at fair value:
Loans held for sale	4,386	7,453
Level 2 Inputs [Member] | Mortgage Loan Servicing Rights [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total		3,721
Level 3 Inputs [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	13,210	23,876
Level 3 Inputs [Member] | Commercial Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	6,053	11,182
Level 3 Inputs [Member] | One-To-Four Family Residential [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	1,593	185
Level 3 Inputs [Member] | Real Estate Construction [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	207	390
Level 3 Inputs [Member] | Commercial [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	$ 5,357	9,845
Level 3 Inputs [Member] | Noncovered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total		$ 2,274