LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans With and Without Specific Reserves) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 101,149		$ 129,845
Unpaid Principal Balance	112,493		151,747
Related Allowance	8,162		10,316
Average Recorded Investment	102,841		152,280
Interest Income Recognized	332		3,058
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,667		4,495
Unpaid Principal Balance	4,918		4,866
Related Allowance	138		285
Average Recorded Investment	4,855		4,775
Interest Income Recognized	0		13
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,035		13,326
Unpaid Principal Balance	11,258		15,818
Related Allowance	1,047		1,746
Average Recorded Investment	10,411		15,199
Interest Income Recognized	0		433
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,134		2,449
Unpaid Principal Balance	7,134		2,449
Related Allowance	1,847		17
Average Recorded Investment	7,137		2,423
Interest Income Recognized	0		114
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			949
Unpaid Principal Balance			1,493
Related Allowance			0
Average Recorded Investment			1,465
Interest Income Recognized			0
One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,200		14,985
Unpaid Principal Balance	12,338		15,309
Related Allowance	1,183		2,435
Average Recorded Investment	10,247		14,765
Interest Income Recognized	249		519
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,725		24,395
Unpaid Principal Balance	14,529		38,747
Related Allowance	1,239		1,792
Average Recorded Investment	10,988		41,271
Interest Income Recognized	15		319
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	340		1,099
Unpaid Principal Balance	500		1,099
Related Allowance	9		45
Average Recorded Investment	429		1,070
Interest Income Recognized	0		0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,843		18,062
Unpaid Principal Balance	11,371		18,868
Related Allowance	1,193		2,336
Average Recorded Investment	11,493		19,308
Interest Income Recognized	1		225
Agricultural business/farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	645		1,895
Unpaid Principal Balance	1,328		2,303
Related Allowance	66		629
Average Recorded Investment	923		2,384
Interest Income Recognized	0		0
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	42,939		44,406
Unpaid Principal Balance	44,862		46,422
Related Allowance	1,340		935
Average Recorded Investment	42,500		45,488
Interest Income Recognized	55		1,388
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,680		1,474
Unpaid Principal Balance	1,796		1,581
Related Allowance	46		67
Average Recorded Investment	1,791		1,505
Interest Income Recognized	0		25
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,941		2,310
Unpaid Principal Balance	2,459		2,792
Related Allowance	54		29
Average Recorded Investment	2,067		2,627
Interest Income Recognized	12		22
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	42,402	[1]	48,398	[1]
Unpaid Principal Balance	46,326	[1]	50,851	[1]
Related Allowance	2,799	[1]	3,283	[1]
Average Recorded Investment	43,551	[1]	50,493	[1]
Interest Income Recognized	163	[1]	1,411	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,186	[1]	852	[1]
Unpaid Principal Balance	2,437	[1]	853	[1]
Related Allowance	134	[1]	78	[1]
Average Recorded Investment	2,355	[1]	874	[1]
Interest Income Recognized	0	[1]	0	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	649	[1]	1,576	[1]
Unpaid Principal Balance	886	[1]	1,618	[1]
Related Allowance	96	[1]	261	[1]
Average Recorded Investment	769	[1]	1,728	[1]
Interest Income Recognized	0	[1]	9	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,134	[1]	452	[1]
Unpaid Principal Balance	2,134	[1]	452	[1]
Related Allowance	433	[1]	6	[1]
Average Recorded Investment	2,137	[1]	456	[1]
Interest Income Recognized	0	[1]	32	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,816	[1]	5,429	[1]
Unpaid Principal Balance	5,878	[1]	5,488	[1]
Related Allowance	516	[1]	437	[1]
Average Recorded Investment	5,066	[1]	5,580	[1]
Interest Income Recognized	118	[1]	242	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,383	[1]	4,064	[1]
Unpaid Principal Balance	2,994	[1]	4,679	[1]
Related Allowance	467	[1]	1,176	[1]
Average Recorded Investment	3,094	[1]	4,524	[1]
Interest Income Recognized	15	[1]	99	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	46	[1]	645	[1]
Unpaid Principal Balance	46	[1]	645	[1]
Related Allowance	9	[1]	45	[1]
Average Recorded Investment	46	[1]	616	[1]
Interest Income Recognized	0	[1]	0	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,728	[1]	5,173	[1]
Unpaid Principal Balance	3,924	[1]	5,535	[1]
Related Allowance	810	[1]	932	[1]
Average Recorded Investment	3,810	[1]	5,587	[1]
Interest Income Recognized	1	[1]	81	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Agricultural business/farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	645	[1]	412	[1]
Unpaid Principal Balance	1,328	[1]	632	[1]
Related Allowance	66	[1]	37	[1]
Average Recorded Investment	923	[1]	529	[1]
Interest Income Recognized	0	[1]	0	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	22,220	[1]	27,529	[1]
Unpaid Principal Balance	23,585	[1]	28,121	[1]
Related Allowance	201	[1]	277	[1]
Average Recorded Investment	22,530	[1]	27,933	[1]
Interest Income Recognized	17	[1]	919	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	953	[1]	559	[1]
Unpaid Principal Balance	1,053	[1]	666	[1]
Related Allowance	13	[1]	5	[1]
Average Recorded Investment	1,048	[1]	624	[1]
Interest Income Recognized	0	[1]	7	[1]
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,642	[1]	1,707	[1]
Unpaid Principal Balance	2,061	[1]	2,162	[1]
Related Allowance	54	[1]	29	[1]
Average Recorded Investment	1,773	[1]	2,042	[1]
Interest Income Recognized	12	[1]	22	[1]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	58,747	[2]	81,447	[2]
Unpaid Principal Balance	66,167	[2]	100,896	[2]
Related Allowance	5,363	[2]	7,033	[2]
Average Recorded Investment	59,290	[2]	101,787	[2]
Interest Income Recognized	169	[2]	1,647	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,481	[2]	3,643	[2]
Unpaid Principal Balance	2,481	[2]	4,013	[2]
Related Allowance	4	[2]	207	[2]
Average Recorded Investment	2,500	[2]	3,901	[2]
Interest Income Recognized	0	[2]	13	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,386	[2]	11,750	[2]
Unpaid Principal Balance	10,372	[2]	14,200	[2]
Related Allowance	951	[2]	1,485	[2]
Average Recorded Investment	9,642	[2]	13,471	[2]
Interest Income Recognized	0	[2]	424	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,000	[2]	1,997	[2]
Unpaid Principal Balance	5,000	[2]	1,997	[2]
Related Allowance	1,414	[2]	11	[2]
Average Recorded Investment	5,000	[2]	1,967	[2]
Interest Income Recognized	0	[2]	82	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			949	[2]
Unpaid Principal Balance			1,493	[2]
Related Allowance			0	[2]
Average Recorded Investment			1,465	[2]
Interest Income Recognized			0	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,384	[2]	9,556	[2]
Unpaid Principal Balance	6,460	[2]	9,821	[2]
Related Allowance	667	[2]	1,998	[2]
Average Recorded Investment	5,181	[2]	9,185	[2]
Interest Income Recognized	131	[2]	277	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,342	[2]	20,331	[2]
Unpaid Principal Balance	11,535	[2]	34,068	[2]
Related Allowance	772	[2]	616	[2]
Average Recorded Investment	7,894	[2]	36,747	[2]
Interest Income Recognized	0	[2]	220	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	294	[2]	454	[2]
Unpaid Principal Balance	454	[2]	454	[2]
Related Allowance	0	[2]	0	[2]
Average Recorded Investment	383	[2]	454	[2]
Interest Income Recognized	0	[2]	0	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,115	[2]	12,889	[2]
Unpaid Principal Balance	7,447	[2]	13,333	[2]
Related Allowance	383	[2]	1,404	[2]
Average Recorded Investment	7,683	[2]	13,721	[2]
Interest Income Recognized	0	[2]	144	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Agricultural business/farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			1,483	[2]
Unpaid Principal Balance			1,671	[2]
Related Allowance			592	[2]
Average Recorded Investment			1,855	[2]
Interest Income Recognized			0	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	20,719	[2]	16,877	[2]
Unpaid Principal Balance	21,277	[2]	18,301	[2]
Related Allowance	1,139	[2]	658	[2]
Average Recorded Investment	19,970	[2]	17,555	[2]
Interest Income Recognized	38	[2]	469	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	727	[2]	915	[2]
Unpaid Principal Balance	743	[2]	915	[2]
Related Allowance	33	[2]	62	[2]
Average Recorded Investment	743	[2]	881	[2]
Interest Income Recognized	0	[2]	18	[2]
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	299	[2]	603	[2]
Unpaid Principal Balance	398	[2]	630	[2]
Related Allowance	0	[2]	0	[2]
Average Recorded Investment	294	[2]	585	[2]
Interest Income Recognized	$ 0	[2]	$ 0	[2]

[1] Loans without a specific allowance reserve have not been individually evaluated for impairment, but have been included in pools of homogeneous loans for evaluation of related allowance reserves.

[2] Loans with a specific allowance reserve have been individually evaluated for impairment using either a discounted cash flow analysis or, for collateral dependent loans, current appraisals to establish realizable value. These analyses may identify a specific impairment amount needed or may conclude that no reserve is needed. Any specific impairment that is identified is included in the category’s Related Allowance column.