Note 3: Loans and Allowance For Loan Losses: Schedule of Allowance for Credit Losses on Financing Receivables (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts Receivable, Beginning Balance	$ 41,232	$ 41,487	$ 40,101
Financing Receivable, Allowance for Credit Losses, Provisions	43,863	35,336	35,630
Allowance for Doubtful Accounts Receivable, Charge-offs	(44,446)	(35,591)	(34,244)
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 40,649	$ 41,232	$ 41,487