Note 27: Condensed Parent Company Statements: Condensed Balance Sheet -- Great Southern Bancorp, Inc. (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Cash	$ 115,600	$ 120,203
Prepaid Expense and Other Assets	47,122	45,649
Total assets	4,414,521	4,550,663
Subordinated Debt	75,000	75,000
Additional paid-in capital	28,203	25,942
Retained earnings	442,077	402,166
Statements of Financial Condition | Parent Company | Assets
Cash	41,977	37,716
Investment in subsidiary bank	533,153	494,947
Deferred income taxes	133	89
Prepaid Expense and Other Assets	903	1,214
Total assets	576,166	533,966
Statements of Financial Condition | Parent Company | Liabilities and Stockholders Equity
Accounts Payable and Other Accrued Liabilities	5,042	4,849
Subordinated Debt	25,774	25,774
Preferred Stock Value Parent	73,688	73,537
Common Stock Value Parent	141	140
Additional paid-in capital	28,203	25,942
Retained earnings	442,077	402,166
Unrealized gain on available-for-sale securities, parent net	1,241	1,558
Total Assets and Liabilities	$ 576,166	$ 533,966