Loans And Allowance For Loan Losses (By Balance In The Allowance For Loan Losses And The Recorded Investment In Loans Portfolio Classification Disaggregated On The Basis Of Impairment Evaluation Method) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	$ 27,546	$ 26,106
Loans charged-off	(2,157)	(3,725)
Recoveries	378	412
Provision for loan losses	1,776	4,375
Balance at end of period	27,543	27,168
Individually evaluated for impairment			$ 3,544		$ 4,127
Collectively evaluated for impairment			23,959		23,041
Total ending allowance balance	27,546	26,106	27,543	$ 27,546	27,168
Individually evaluated for impairment			14,653		34,487
Collectively evaluated for impairment			1,917,973		1,740,109
Total ending loans balance			1,936,443	1,877,132	1,781,884
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at end of period	40
Total ending allowance balance	40		40
Total ending loans balance			3,817		7,288
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	316	192
Loans charged-off	(116)	(74)
Recoveries	24	23
Provision for loan losses	92	57
Balance at end of period	316	198
Collectively evaluated for impairment			316		198
Total ending allowance balance	316	192	316	316	198
Individually evaluated for impairment					43
Collectively evaluated for impairment			18,126		20,428
Total ending loans balance			18,126	19,631	20,506
Other [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance					35
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			925,458	882,071
Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	12,507	12,716
Loans charged-off	(2,029)	(14)
Recoveries	182	201
Provision for loan losses	1,353	(1,782)
Balance at end of period	12,013	11,121
Individually evaluated for impairment					914
Collectively evaluated for impairment			12,013		10,207
Total ending allowance balance	12,507	12,716	12,013	12,507	11,121
Individually evaluated for impairment			712		20,341
Collectively evaluated for impairment			922,999		854,097
Total ending loans balance			925,458	882,071	878,822
Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			1,747		4,384
One-To-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			210,495	199,123
One-To-Four Family Residential [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	1,163	700
Loans charged-off		(84)
Recoveries	55	43
Provision for loan losses	2	216
Balance at end of period	1,220	875
Individually evaluated for impairment			63		135
Collectively evaluated for impairment			1,157		740
Total ending allowance balance	1,163	700	1,220	1,163	875
Individually evaluated for impairment			1,762		560
Collectively evaluated for impairment			207,541		155,892
Total ending loans balance			210,495	199,123	158,078
One-To-Four Family Residential [Member] | Residential Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			1,192		1,626
Construction Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			193,937	199,113
Construction Loans [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			18,426	20,946
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			570,001	556,248
Commercial [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	10,058	9,965
Loans charged-off	(12)	(3,553)
Recoveries	117	145
Provision for loan losses	676	5,517
Balance at end of period	10,839	12,074
Individually evaluated for impairment			3,481		3,038
Collectively evaluated for impairment			7,358		9,036
Total ending allowance balance	10,058	9,965	10,839	10,058	12,074
Individually evaluated for impairment			11,789		13,153
Collectively evaluated for impairment			557,989		530,203
Total ending loans balance			570,001	556,248	543,822
Commercial [Member] | Commercial Portfolio Segment [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			223		466
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance			212,363	220,059
Real Estate Construction [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	3,502	2,533
Provision for loan losses	(347)	367
Balance at end of period	3,155	2,900
Individually evaluated for impairment					40
Collectively evaluated for impairment			3,115		2,860
Total ending allowance balance	3,502	$ 2,533	3,155	$ 3,502	2,900
Individually evaluated for impairment			390		390
Collectively evaluated for impairment			211,318		179,489
Total ending loans balance			212,363		180,656
Real Estate Construction [Member] | Real Estate Construction [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at end of period	40
Total ending allowance balance	$ 40		40
Total ending loans balance			$ 655		$ 777