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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		$ 47,763		$ 47,763		$ 41,295
Recorded Investment, Without Allowance	[1]	18,276		18,276		8,637
Recorded Investment, With Allowance	[2]	26,671		26,671		28,360
Related Allowance		2,147		2,147		2,307
Average Recorded Investment		49,891	$ 39,534	51,065	$ 39,786
Interest Income Recognized		288	265	816	946
Commerical real estate - owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,589		1,589		1,465
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	1,541		1,541		1,416
Related Allowance		105		105		70
Average Recorded Investment		2,544	1,584	2,673	1,674
Interest Income Recognized		3	3	9	8
Commerical real estate - investment properties [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		17,537		17,537		8,740
Recorded Investment, Without Allowance	[1]	9,691		9,691		2,503
Recorded Investment, With Allowance	[2]	7,431		7,431		5,846
Related Allowance		739		739		602
Average Recorded Investment		19,046	8,399	19,775	7,890
Interest Income Recognized		74	76	224	228
Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		541		541		359
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	529		529		357
Related Allowance		69		69		71
Average Recorded Investment		529	362	518	364
Interest Income Recognized		27	3	36	14
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance						1,141
Recorded Investment, Without Allowance	[1]					1,069
Recorded Investment, With Allowance	[2]					0
Related Allowance						0
One- to four-family construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,176		1,176		1,741
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	1,176		1,176		1,741
Related Allowance		157		157		161
Average Recorded Investment		1,176	2,530	1,151	2,385
Interest Income Recognized		3	29	56	87
Land and land development - residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		3,119		3,119		3,540
Recorded Investment, Without Allowance	[1]	750		750		750
Recorded Investment, With Allowance	[2]	1,213		1,213		1,634
Related Allowance		236		236		444
Average Recorded Investment		1,964	2,400	1,971	2,412
Interest Income Recognized		20	9	63	40
Land and land development - commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,608		1,608		1,628
Recorded Investment, Without Allowance	[1]	997		997		1,027
Recorded Investment, With Allowance	[2]	0		0		0
Related Allowance		0		0		0
Average Recorded Investment		997	1,783	1,005	1,861
Interest Income Recognized		0	0	0	0
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		3,398		3,398		2,266
Recorded Investment, Without Allowance	[1]	1,057		1,057		538
Recorded Investment, With Allowance	[2]	2,228		2,228		1,184
Related Allowance		346		346		150
Average Recorded Investment		4,283	1,813	4,470	1,699
Interest Income Recognized		16	8	28	27
Agricultural business, including secured by farmland [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		4,452		4,452		1,309
Recorded Investment, Without Allowance	[1]	3,896		3,896		544
Recorded Investment, With Allowance	[2]	476		476		697
Related Allowance		30		30		43
Average Recorded Investment		4,973	977	4,824	905
Interest Income Recognized		6	10	19	19
One- to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		12,262		12,262		17,897
Recorded Investment, Without Allowance	[1]	1,878		1,878		2,206
Recorded Investment, With Allowance	[2]	10,045		10,045		14,418
Related Allowance		451		451		736
Average Recorded Investment		11,973	18,558	12,193	19,349
Interest Income Recognized		131	124	358	503
Consumer secured by one- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		1,591		1,591		776
Recorded Investment, Without Allowance	[1]	0		0		0
Recorded Investment, With Allowance	[2]	1,547		1,547		716
Related Allowance		11		11		23
Average Recorded Investment		1,894	814	1,913	894
Interest Income Recognized		5	1	13	8
Consumer - other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		490		490		433
Recorded Investment, Without Allowance	[1]	7		7		0
Recorded Investment, With Allowance	[2]	485		485		351
Related Allowance		3		3		$ 7
Average Recorded Investment		512	314	572	353
Interest Income Recognized		$ 3	$ 2	$ 10	$ 12

[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 allowance reserve. 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.