LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Impaired Loans With and Without Specific Reserves) (Details) - USD ($) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2015		Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment		$ (49,405)		$ (45,891)
Unpaid Principal Balance		53,620		49,319
Related Allowance		2,578		3,092
Average Recorded Investment		46,527		45,440
Interest Income Recognized		858		1,528
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(3,071)		(1,548)
Unpaid Principal Balance		3,121		1,598
Related Allowance		36		24
Average Recorded Investment		1,648		1,841
Interest Income Recognized		39		12
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(5,931)		(6,054)
Unpaid Principal Balance		6,335		6,458
Related Allowance		629		729
Average Recorded Investment		5,969		6,145
Interest Income Recognized		152		315
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(1,346)		(786)
Unpaid Principal Balance		1,346		786
Related Allowance		82		86
Average Recorded Investment		875		795
Interest Income Recognized		29		45
One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(3,620)		(3,923)
Unpaid Principal Balance		3,658		3,923
Related Allowance		262		640
Average Recorded Investment		3,202		2,655
Interest Income Recognized		86		118
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(2,481)		(2,554)
Unpaid Principal Balance		3,637		3,710
Related Allowance		257		346
Average Recorded Investment		2,524		2,872
Interest Income Recognized		31		89
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(6,665)
Unpaid Principal Balance		7,240
Related Allowance		0
Average Recorded Investment		5,112
Interest Income Recognized		87
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(866)		(1,276)
Unpaid Principal Balance		873		1,502
Related Allowance		84		128
Average Recorded Investment		913		1,328
Interest Income Recognized		19		41
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(2,254)		(1,597)
Unpaid Principal Balance		2,579		1,597
Related Allowance		139		26
Average Recorded Investment		2,370		1,866
Interest Income Recognized		10		0
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(21,447)		(26,394)
Unpaid Principal Balance		22,827		27,855
Related Allowance		1,024		1,032
Average Recorded Investment		22,253		26,093
Interest Income Recognized		380		870
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(953)		(1,151)
Unpaid Principal Balance		1,028		1,256
Related Allowance		59		75
Average Recorded Investment		988		1,248
Interest Income Recognized		7		19
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(771)		(608)
Unpaid Principal Balance		976		634
Related Allowance		6		6
Average Recorded Investment		673		597
Interest Income Recognized		18		19
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(17,623)		(11,445)
Unpaid Principal Balance	[1]	19,499		12,534
Related Allowance	[1]	183		126
Average Recorded Investment	[1]	14,191		10,650
Interest Income Recognized	[1]	177		32
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(2,759)		(399)
Unpaid Principal Balance	[1]	2,809		449
Related Allowance	[1]	32		20
Average Recorded Investment	[1]	1,245		526
Interest Income Recognized	[1]	34		0
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(19)		(32)
Unpaid Principal Balance	[1]	19		32
Related Allowance	[1]	3		5
Average Recorded Investment	[1]	24		44
Interest Income Recognized	[1]	0		0
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(570)
Unpaid Principal Balance	[1]	570
Related Allowance	[1]	0
Average Recorded Investment	[1]	95
Interest Income Recognized	[1]	18
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(1,186)
Unpaid Principal Balance		1,224
Related Allowance		0
Average Recorded Investment		889
Interest Income Recognized		28
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(4,765)
Unpaid Principal Balance		5,340
Related Allowance		0
Average Recorded Investment		3,212
Interest Income Recognized		87
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(179)		(537)
Unpaid Principal Balance	[1]	186		763
Related Allowance	[1]	9		46
Average Recorded Investment	[1]	215		566
Interest Income Recognized	[1]	0		0
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(1,008)		(853)
Unpaid Principal Balance	[1]	1,333		853
Related Allowance	[1]	123		26
Average Recorded Investment	[1]	1,163		1,122
Interest Income Recognized	[1]	0		0
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(5,936)		(8,546)
Unpaid Principal Balance	[1]	6,553		9,244
Related Allowance	[1]	13		18
Average Recorded Investment	[1]	6,232		7,284
Interest Income Recognized	[1]	1		29
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]	(610)		(783)
Unpaid Principal Balance	[1]	685		888
Related Allowance	[1]	2		11
Average Recorded Investment	[1]	626		838
Interest Income Recognized	[1]	0		3
Loans Without Specific Allowance Reserve, Collectively Evaluated for Impairment [Member] | Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[1]	(591)		(295)
Unpaid Principal Balance	[1]	780		305
Related Allowance	[1]	1		0
Average Recorded Investment	[1]	490		270
Interest Income Recognized	[1]	9		0
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(31,782)		(34,446)
Unpaid Principal Balance	[2]	34,121		36,785
Related Allowance	[2]	2,395		2,966
Average Recorded Investment	[2]	32,336		34,790
Interest Income Recognized	[2]	681		1,496
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(312)		(1,149)
Unpaid Principal Balance	[2]	312		1,149
Related Allowance	[2]	4		4
Average Recorded Investment	[2]	403		1,315
Interest Income Recognized	[2]	5		12
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(5,912)		(6,022)
Unpaid Principal Balance	[2]	6,316		6,426
Related Allowance	[2]	626		724
Average Recorded Investment	[2]	5,945		6,101
Interest Income Recognized	[2]	152		315
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(776)		(786)
Unpaid Principal Balance	[2]	776		786
Related Allowance	[2]	82		86
Average Recorded Investment	[2]	780		795
Interest Income Recognized	[2]	11		45
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(2,434)		(3,923)
Unpaid Principal Balance	[2]	2,434		3,923
Related Allowance	[2]	262		640
Average Recorded Investment	[2]	2,313		2,655
Interest Income Recognized	[2]	58		118
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(2,481)		(2,554)
Unpaid Principal Balance	[2]	3,637		3,710
Related Allowance	[2]	257		346
Average Recorded Investment	[2]	2,524		2,872
Interest Income Recognized	[2]	31		89
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(1,900)
Unpaid Principal Balance		1,900
Related Allowance		0
Average Recorded Investment		1,900
Interest Income Recognized		0
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(687)		(739)
Unpaid Principal Balance	[2]	687		739
Related Allowance	[2]	75		82
Average Recorded Investment	[2]	698		762
Interest Income Recognized	[2]	19		41
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		(1,246)		(744)
Unpaid Principal Balance		1,246		744
Related Allowance		16		0
Average Recorded Investment		1,207		744
Interest Income Recognized		10		0
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(15,511)		(17,848)
Unpaid Principal Balance	[2]	16,274		18,611
Related Allowance		1,011	[2]	1,014
Average Recorded Investment	[2]	16,021		18,809
Interest Income Recognized	[2]	379		841
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(343)		(368)
Unpaid Principal Balance	[2]	343		368
Related Allowance	[2]	57		64
Average Recorded Investment	[2]	362		410
Interest Income Recognized	[2]	7		16
With Specific Allowance Reserve , Individually Evaluated for Impairment [Member] | Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	[2]	(180)		(313)
Unpaid Principal Balance	[2]	196		329
Related Allowance	[2]	5		6
Average Recorded Investment	[2]	183		327
Interest Income Recognized	[2]	$ 9		$ 19

[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 less costs to sell 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.