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, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	$ 44,684	$ 65,229	$ 62,413
Loans charged-off	(7,540)	(156,625)	(34,439)
Recoveries	6,467	3,979	1,695
Provision for loan losses	3,107	132,101	35,560
Balance at end of period	46,718	44,684	65,229
Individually evaluated for impairment	11,724	966	19,994
Collectively evaluated for impairment	34,770	43,267	45,235
Acquired with deteriorated credit quality	224	451
Individually evaluated for impairment	75,674	45,765	169,628
Collectively evaluated for impairment	1,277,354	1,680,108	2,196,859
Acquired with deteriorated credit quality	25,707	37,615	53,628
Total ending loans balance	1,378,735	1,763,488	2,420,115
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	21,749	32,508	26,670
Loans charged-off	(2,167)	(71,066)	(4,571)
Recoveries	58	411	204
Provision for loan losses	7,583	59,896	10,205
Balance at end of period	27,223	21,749	32,508
Individually evaluated for impairment	5,094	411	10,813
Collectively evaluated for impairment	21,975	21,198	21,695
Acquired with deteriorated credit quality	154	140
Individually evaluated for impairment	54,055	21,701	72,796
Collectively evaluated for impairment	816,920	1,006,860	1,237,668
Acquired with deteriorated credit quality	18,298	23,686	30,997
Total ending loans balance	889,273	1,052,247	1,341,461
One-To-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	1,016	1,597	2,454
Loans charged-off	(269)	(346)	(2,649)
Recoveries	271	67	234
Provision for loan losses	(157)	(302)	1,558
Balance at end of period	861	1,016	1,597
Individually evaluated for impairment	7	21	197
Collectively evaluated for impairment	785	981	1,400
Acquired with deteriorated credit quality	69	14
Individually evaluated for impairment	570	1,468	1,983
Collectively evaluated for impairment	70,384	78,907	87,817
Acquired with deteriorated credit quality	4,881	7,072	9,122
Total ending loans balance	75,835	87,447	98,922
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	11,177	19,605	22,241
Loans charged-off		(62,070)	(20,910)
Recoveries	1,972	1,521	610
Provision for loan losses	(7,878)	52,121	17,664
Balance at end of period	5,271	11,177	19,605
Individually evaluated for impairment	50	73	5,313
Collectively evaluated for impairment	5,221	10,846	14,292
Acquired with deteriorated credit quality		258
Individually evaluated for impairment	4,202	11,983	82,557
Collectively evaluated for impairment	130,207	220,102	386,137
Acquired with deteriorated credit quality	382	3,746	7,279
Total ending loans balance	134,791	235,831	475,973
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	9,827	10,605	10,052
Loans charged-off	(4,455)	(22,103)	(5,182)
Recoveries	3,671	1,864	421
Provision for loan losses	3,561	19,461	5,314
Balance at end of period	12,604	9,827	10,605
Individually evaluated for impairment	6,492	349	3,643
Collectively evaluated for impairment	6,111	9,439	6,962
Acquired with deteriorated credit quality	1	39
Individually evaluated for impairment	16,759	10,490	12,254
Collectively evaluated for impairment	223,739	335,776	440,372
Acquired with deteriorated credit quality	2,037	2,841	5,554
Total ending loans balance	242,535	349,107	458,180
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Balance at beginning of period	915	914	996
Loans charged-off	(649)	(1,040)	(1,127)
Recoveries	495	116	226
Provision for loan losses	(2)	925	819
Balance at end of period	759	915	914
Individually evaluated for impairment	81	112	28
Collectively evaluated for impairment	678	803	886
Individually evaluated for impairment	88	123	38
Collectively evaluated for impairment	36,104	38,463	44,865
Acquired with deteriorated credit quality	109	270	676
Total ending loans balance	$ 36,301	$ 38,856	$ 45,579