LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans With and Without Specific Reserves) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		$ 42,695		$ 42,695		$ 49,319
Recorded Investment, Without Allowance	[1]	4,742		4,742		5,091
Recorded Investment, With Allowance	[2]	34,163		34,163		40,800
Related Allowance		2,833		2,833		3,092
Average Recorded Investment		39,534	$ 49,913	39,786	$ 50,427
Interest Income Recognized		265	362	946	1,345
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,619		1,619		1,598
Recorded Investment, Without Allowance	[1]	129		129		966
Recorded Investment, With Allowance	[2]	1,439		1,439		582
Related Allowance		57		57		24
Average Recorded Investment		1,584	3,304	1,674	3,134
Interest Income Recognized		3	22	8	46
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		8,788		8,788		6,458
Recorded Investment, Without Allowance	[1]	0		0		30
Recorded Investment, With Allowance	[2]	8,384		8,384		6,023
Related Allowance		988		988		729
Average Recorded Investment		8,399	6,383	7,890	6,449
Interest Income Recognized		76	78	228	238
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		361		361		786
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	361		361		786
Related Allowance		73		73		86
Average Recorded Investment		362	1,195	364	1,220
Interest Income Recognized		3	(93)	14	34
One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		2,582		2,582		3,923
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	2,582		2,582		3,923
Related Allowance		216		216		640
Average Recorded Investment		2,530	3,625	2,385	3,501
Interest Income Recognized		29	17	87	120
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		3,552		3,552		3,710
Recorded Investment, Without Allowance	[1]	750		750		1,275
Recorded Investment, With Allowance	[2]	1,647		1,647		1,280
Related Allowance		455		455		346
Average Recorded Investment		2,400	2,926	2,412	2,937
Interest Income Recognized		9	21	40	67
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,899		1,899
Recorded Investment, Without Allowance	[1]	1,549		1,549
Recorded Investment, With Allowance	[2]	0		0
Related Allowance		0		0
Average Recorded Investment		1,783	0	1,861	0
Interest Income Recognized		0	0	0	0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,878		1,878		1,502
Recorded Investment, Without Allowance	[1]	9		9		0
Recorded Investment, With Allowance	[2]	1,620		1,620		1,276
Related Allowance		226		226		128
Average Recorded Investment		1,813	2,240	1,699	2,225
Interest Income Recognized		8	19	27	52
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,078		1,078		1,597
Recorded Investment, Without Allowance	[1]	0		0		744
Recorded Investment, With Allowance	[2]	1,004		1,004		854
Related Allowance		40		40		26
Average Recorded Investment		977	229	905	102
Interest Income Recognized		10	0	19	0
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		19,555		19,555		27,855
Recorded Investment, Without Allowance	[1]	2,148		2,148		1,865
Recorded Investment, With Allowance	[2]	16,161		16,161		24,529
Related Allowance		716		716		1,032
Average Recorded Investment		18,558	28,117	19,349	28,896
Interest Income Recognized		124	282	503	748
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		985		985		1,256
Recorded Investment, Without Allowance	[1]	72		72		73
Recorded Investment, With Allowance	[2]	734		734		1,077
Related Allowance		56		56		75
Average Recorded Investment		814	970	894	1,025
Interest Income Recognized		1	4	8	13
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		398		398		634
Recorded Investment, Without Allowance	[1]	85		85		138
Recorded Investment, With Allowance	[2]	231		231		470
Related Allowance		6		6		$ 6
Average Recorded Investment		314	924	353	938
Interest Income Recognized		$ 2	$ 12	$ 12	$ 27

[1] Loans without an allowance reserve have been individually evaluated for impairment and that evaluation concluded that no reserve was needed.

[2] Includes general reserves for loans evaluated in pools of homogeneous loans and loans with a specific reserve allowance. 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 less costs to sell to establish realizable value.