LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans With and Without Specific Reserves) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 91,852		$ 129,845
Unpaid Principal Balance	98,232		151,747
Related Allowance	8,338		10,316
Average Recorded Investment	92,583		152,280
Interest Income Recognized	2,748		3,058
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,293		4,495
Unpaid Principal Balance	4,544		4,866
Related Allowance	621		285
Average Recorded Investment	4,583		4,775
Interest Income Recognized	0		13
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,508		13,326
Unpaid Principal Balance	10,981		15,818
Related Allowance	720		1,746
Average Recorded Investment	10,184		15,199
Interest Income Recognized	246		433
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,131		2,449
Unpaid Principal Balance	7,131		2,449
Related Allowance	1,665		17
Average Recorded Investment	7,136		2,423
Interest Income Recognized	408		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	8,291		14,985
Unpaid Principal Balance	8,291		15,309
Related Allowance	1,441		2,435
Average Recorded Investment	6,946		14,765
Interest Income Recognized	339		519
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,904		24,395
Unpaid Principal Balance	7,369		38,747
Related Allowance	990		1,792
Average Recorded Investment	7,987		41,271
Interest Income Recognized	258		319
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	46		1,099
Unpaid Principal Balance	46		1,099
Related Allowance	12		45
Average Recorded Investment	46		1,070
Interest Income Recognized	0		0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,725		18,062
Unpaid Principal Balance	8,704		18,868
Related Allowance	955		2,336
Average Recorded Investment	6,052		19,308
Interest Income Recognized	160		225
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			1,895
Unpaid Principal Balance			2,303
Related Allowance			629
Average Recorded Investment			2,384
Interest Income Recognized			0
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	43,380		44,406
Unpaid Principal Balance	45,676		46,422
Related Allowance	1,806		935
Average Recorded Investment	44,558		45,488
Interest Income Recognized	1,303		1,388
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,683		2,310
Unpaid Principal Balance	3,475		2,792
Related Allowance	80		29
Average Recorded Investment	3,040		2,627
Interest Income Recognized	29		22
Consumer - other Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,891		1,474
Unpaid Principal Balance	2,015		1,581
Related Allowance	48		67
Average Recorded Investment	2,051		1,505
Interest Income Recognized	5		25
Without a specific allowance reserve [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	28,729	[1]	48,398	[1]
Unpaid Principal Balance	32,220	[1]	50,851	[1]
Related Allowance	2,613	[1]	3,283	[1]
Average Recorded Investment	27,512	[1]	50,493	[1]
Interest Income Recognized	565	[1]	1,411	[1]
Without a specific allowance reserve [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,300	[1]	852	[1]
Unpaid Principal Balance	1,551	[1]	853	[1]
Related Allowance	103	[1]	78	[1]
Average Recorded Investment	1,470	[1]	874	[1]
Interest Income Recognized	0	[1]	0	[1]
Without a specific allowance reserve [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	624	[1]	1,576	[1]
Unpaid Principal Balance	861	[1]	1,618	[1]
Related Allowance	90	[1]	261	[1]
Average Recorded Investment	735	[1]	1,728	[1]
Interest Income Recognized	17	[1]	9	[1]
Without a specific allowance reserve [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,131	[1]	452	[1]
Unpaid Principal Balance	2,131	[1]	452	[1]
Related Allowance	392	[1]	6	[1]
Average Recorded Investment	2,136	[1]	456	[1]
Interest Income Recognized	113	[1]	32	[1]
Without a specific allowance reserve [Member] | Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			5,429	[1]
Unpaid Principal Balance			5,488	[1]
Related Allowance			437	[1]
Average Recorded Investment			5,580	[1]
Interest Income Recognized			242	[1]
Without a specific allowance reserve [Member] | One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,460	[1]
Unpaid Principal Balance	4,460	[1]
Related Allowance	571	[1]
Average Recorded Investment	3,335	[1]
Interest Income Recognized	145	[1]
Without a specific allowance reserve [Member] | Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,122	[1]	4,064	[1]
Unpaid Principal Balance	2,587	[1]	4,679	[1]
Related Allowance	404	[1]	1,176	[1]
Average Recorded Investment	2,948	[1]	4,524	[1]
Interest Income Recognized	73	[1]	99	[1]
Without a specific allowance reserve [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	12	[1]	45	[1]
Average Recorded Investment	46	[1]	616	[1]
Interest Income Recognized	0	[1]	0	[1]
Without a specific allowance reserve [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,352	[1]	5,173	[1]
Unpaid Principal Balance	4,970	[1]	5,535	[1]
Related Allowance	821	[1]	932	[1]
Average Recorded Investment	2,121	[1]	5,587	[1]
Interest Income Recognized	154	[1]	81	[1]
Without a specific allowance reserve [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			412	[1]
Unpaid Principal Balance			632	[1]
Related Allowance			37	[1]
Average Recorded Investment			529	[1]
Interest Income Recognized			0	[1]
Without a specific allowance reserve [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,886	[1]	27,529	[1]
Unpaid Principal Balance	12,004	[1]	28,121	[1]
Related Allowance	150	[1]	277	[1]
Average Recorded Investment	11,458	[1]	27,933	[1]
Interest Income Recognized	44	[1]	919	[1]
Without a specific allowance reserve [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,641	[1]	1,707	[1]
Unpaid Principal Balance	2,335	[1]	2,162	[1]
Related Allowance	54	[1]	29	[1]
Average Recorded Investment	1,966	[1]	2,042	[1]
Interest Income Recognized	14	[1]	22	[1]
Without a specific allowance reserve [Member] | Consumer - other Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,167	[1]	559	[1]
Unpaid Principal Balance	1,275	[1]	666	[1]
Related Allowance	16	[1]	5	[1]
Average Recorded Investment	1,297	[1]	624	[1]
Interest Income Recognized	5	[1]	7	[1]
With a specific allowance reserve [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	63,123	[2]	81,447	[2]
Unpaid Principal Balance	66,012	[2]	100,896	[2]
Related Allowance	5,725	[2]	7,033	[2]
Average Recorded Investment	65,071	[2]	101,787	[2]
Interest Income Recognized	2,183	[2]	1,647	[2]
With a specific allowance reserve [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,993	[2]	3,643	[2]
Unpaid Principal Balance	2,993	[2]	4,013	[2]
Related Allowance	518	[2]	207	[2]
Average Recorded Investment	3,113	[2]	3,901	[2]
Interest Income Recognized	0	[2]	13	[2]
With a specific allowance reserve [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,884	[2]	11,750	[2]
Unpaid Principal Balance	10,120	[2]	14,200	[2]
Related Allowance	630	[2]	1,485	[2]
Average Recorded Investment	9,449	[2]	13,471	[2]
Interest Income Recognized	229	[2]	424	[2]
With a specific allowance reserve [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	1,273	[2]	11	[2]
Average Recorded Investment	5,000	[2]	1,967	[2]
Interest Income Recognized	295	[2]	82	[2]
With a specific allowance reserve [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 a specific allowance reserve [Member] | One-to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,831	[2]	9,556	[2]
Unpaid Principal Balance	3,831	[2]	9,821	[2]
Related Allowance	870	[2]	1,998	[2]
Average Recorded Investment	3,611	[2]	9,185	[2]
Interest Income Recognized	194	[2]	277	[2]
With a specific allowance reserve [Member] | Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,782	[2]	20,331	[2]
Unpaid Principal Balance	4,782	[2]	34,068	[2]
Related Allowance	586	[2]	616	[2]
Average Recorded Investment	5,039	[2]	36,747	[2]
Interest Income Recognized	185	[2]	220	[2]
With a specific allowance reserve [Member] | Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	[2]	454	[2]
Unpaid Principal Balance	0	[2]	454	[2]
Related Allowance	0	[2]	0	[2]
Average Recorded Investment	0	[2]	454	[2]
Interest Income Recognized	0	[2]	0	[2]
With a specific allowance reserve [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,373	[2]	12,889	[2]
Unpaid Principal Balance	3,734	[2]	13,333	[2]
Related Allowance	134	[2]	1,404	[2]
Average Recorded Investment	3,931	[2]	13,721	[2]
Interest Income Recognized	6	[2]	144	[2]
With a specific allowance reserve [Member] | Agricultural business, including secured by 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 a specific allowance reserve [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	32,494	[2]	16,877	[2]
Unpaid Principal Balance	33,672	[2]	18,301	[2]
Related Allowance	1,656	[2]	658	[2]
Average Recorded Investment	33,100	[2]	17,555	[2]
Interest Income Recognized	1,259	[2]	469	[2]
With a specific allowance reserve [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,042	[2]	603	[2]
Unpaid Principal Balance	1,140	[2]	630	[2]
Related Allowance	26	[2]	0	[2]
Average Recorded Investment	1,074	[2]	585	[2]
Interest Income Recognized	15	[2]	0	[2]
With a specific allowance reserve [Member] | Consumer - other Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	724	[2]	915	[2]
Unpaid Principal Balance	740	[2]	915	[2]
Related Allowance	32	[2]	62	[2]
Average Recorded Investment	754	[2]	881	[2]
Interest Income Recognized	$ 0	[2]	$ 18	[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.