Great Southern Bancorp, Inc. - Consolidated Statements of Financial Condition (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowance for loan losses	$ 40,649	$ 41,232
Serial preferred stock - SBLF
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	1,000,000	1,000,000
Preferred stock, issued shares	57,943	57,943
Preferred stock, outstanding shares	57,943	57,943
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	20,000,000	20,000,000
Common stock, issued shares	13,596,335	13,479,856
Common stock, outstanding shares	13,596,335	13,479,856
Income tax expense on change in unrealized holding gain on available-for-sale securities	$ 8,965	$ 6,684