Great Southern Bancorp, Inc. -- Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities
Net income	$ 45,342	$ 46,502	$ 43,529
Proceeds from sales of loans held for sale	156,835	158,730	156,632
Originations of loans held for sale	(156,036)	(155,680)	(160,074)
Items not requiring (providing) cash
Depreciation	9,816	10,465	8,747
Amortization	3,656	3,430	3,242
Compensation expense for stock option grants	483	382	565
Provision for loan losses	9,281	5,519	4,151
Net gains on loan sales	(3,941)	(3,888)	(4,133)
Net realized gains on available-for-sale securities	(2,873)	(2)	(2,139)
Gain on sale of non-marketable securities		(301)
Gain on redemption of trust preferred securities		(1,115)
(Gain) loss on sale of premises and equipment	(249)	(465)	18
(Gain) loss on sale/write-down of other real estate owned	489	(1,132)	2,996
Gain on purchase of additional business units			(10,805)
Gain on sale of business units	(368)
Amortization of deferred income, premiums, discounts and other	4,423	10,595	22,692
(Gain) loss on derivative interest rate products	(66)	43	345
Deferred income taxes	(3,621)	(4,670)	(6,260)
Changes in
Interest receivable	(535)	289	1,227
Prepaid expenses and other assets	12,655	3,982	8,430
Accrued expenses and other liabilities	(2,720)	3,354	502
Income taxes refundable/payable	7,484	(4,609)	(2,232)
Net cash provided by operating activities	80,055	71,429	67,433
Investing Activities
Net change in loans	(79,891)	(190,154)	(340,135)
Purchase of loans	(210,810)	(117,634)	(101,832)
Proceeds from sale of student loans	368
Cash received from purchase of additional business units	44,363		189,437
Cash received from FDIC loss sharing reimbursements	831	2,599	8,377
Cash paid for sale of business units	(17,821)
Purchase of premises and equipment	(10,878)	(16,697)	(17,954)
Proceeds from sale of premises and equipment	1,178	1,883	203
Proceeds from sale of foreclosed assets	28,362	23,497	21,706
Capitalized costs on foreclosed assets	(146)	(20)	(199)
Proceeds from sale of non-marketable securities		351
Proceeds from maturities, calls and repayments of held-to-maturity securities	106	97	355
Proceeds from sale of available-for-sale securities	55,000	56,169	220,169
Proceeds from maturities, calls and repayments of available-for-sale securities	60,827	63,463	103,475
Purchase of available-for-sale securities	(71,904)	(21,339)	(40,661)
(Purchase) redemption of Federal Home Loan Bank stock	2,269	1,590	(7,071)
Net cash provided by (used in) investing activities	(198,146)	(196,195)	35,870
Financing Activities
Net increase (decrease) in certificates of deposit	162,763	191,224	(116,139)
Net increase (decrease) in checking and savings accounts	36,126	87,113	(160,144)
Proceeds from Federal Home Loan Bank advances	1,793,000	6,509,500	4,231,000
Repayments of Federal Home Loan Bank advances	(2,025,070)	(6,517,564)	(4,083,315)
Net increase (decrease) in short term borrowings	168,546	(93,967)	74,768
Proceeds from issuance of subordinated notes	73,472
Repayments of structured repurchase borrowings			(50,000)
Advances from (to) borrowers for taxes and insurance	(38)	(248)	580
Redemption of trust preferred securities		(3,885)
Redemption of preferred stock		(57,943)
Dividends paid	(12,232)	(12,290)	(11,257)
Purchase of the Company's common stock			(512)
Stock options exercised	2,110	3,362	2,438
Net cash provided by (used in) financing activities	198,677	105,302	(112,581)
Increase (Decrease) in Cash and Cash Equivalents	80,586	(19,464)	(9,278)
Cash and Cash Equivalents, Beginning of Year	199,183	218,647	227,925
Cash and Cash Equivalents, End of Year	$ 279,769	$ 199,183	$ 218,647