Fair Value Measurements (Asset Measured At Fair Value On A Nonrecurring Basis) (Details) (Fair Value Measurements Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Noncovered impaired loans at fair value:
Assets fair value, Total	$ 64,225	$ 33,209
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(14,398)	(10,837)
Commercial Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	33,137	3,716
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(6,674)	(1,727)
One-To-Four Family Residential [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	23	604
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(7)	(55)
Real Estate Construction [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	232	3,877
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	3,532	(3,569)
Commercial [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	13,473	3,239
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(6,637)	(1,964)
Other Consumer [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	81	112
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	31	(103)
Noncovered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	11,315	19,844
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(3,998)	(3,104)
Covered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	3,643
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(180)
Mortgage Loan Servicing Rights [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	2,321	1,817
Noncovered Impaired Loans at Fair Value Total Gains (Losses)	(465)	(315)
Level 2 Inputs [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	61,904	31,392
Level 2 Inputs [Member] | Commercial Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	33,137	3,716
Level 2 Inputs [Member] | One-To-Four Family Residential [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	23	604
Level 2 Inputs [Member] | Real Estate Construction [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	232	3,877
Level 2 Inputs [Member] | Commercial [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	13,473	3,239
Level 2 Inputs [Member] | Other Consumer [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	81	112
Level 2 Inputs [Member] | Noncovered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	11,315	19,844
Level 2 Inputs [Member] | Covered Other Real Estate [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	3,643
Level 3 Inputs [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	2,321	1,817
Level 3 Inputs [Member] | Mortgage Loan Servicing Rights [Member]
Noncovered impaired loans at fair value:
Assets fair value, Total	$ 2,321	$ 1,817