Note 12: Fair Value Measurement: Schedule of Fair Value of Financial Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financial assets cash and cash equivalents
Fair Value Financial Assets And Liabilities Carrying Amount	$ 485,184	$ 380,249
Fair Value Financial Assets And Liabilities	485,184	380,249
Fair Value Financial Assets And Liabilities Heirarchy Level	1
Financial assets held to maturity securities
Fair Value Financial Assets And Liabilities Carrying Amount	920	1,865
Fair Value Financial Assets And Liabilities	1,098	2,101
Fair Value Financial Assets And Liabilities Heirarchy Level	2
Financial assets mortgage loans held for sale
Fair Value Financial Assets And Liabilities Carrying Amount	35,093	28,920
Fair Value Financial Assets And Liabilities	35,093	28,920
Fair Value Financial Assets And Liabilities Heirarchy Level	2
Financial assets loans net of allowance for loan losses
Fair Value Financial Assets And Liabilities Carrying Amount	2,332,510	2,124,161
Fair Value Financial Assets And Liabilities	2,341,194	2,124,032
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial assets accrued intereste receivable
Fair Value Financial Assets And Liabilities Carrying Amount	13,183	13,848
Fair Value Financial Assets And Liabilities	13,183	13,848
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial assets investment in FHLB stock
Fair Value Financial Assets And Liabilities Carrying Amount	10,066	12,088
Fair Value Financial Assets And Liabilities	10,066	12,088
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities deposits
Fair Value Financial Assets And Liabilities Carrying Amount	3,250,864	2,963,539
Fair Value Financial Assets And Liabilities	3,254,399	2,966,874
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities FHLB advances
Fair Value Financial Assets And Liabilities Carrying Amount	126,296	184,437
Fair Value Financial Assets And Liabilities	130,480	189,793
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities short term borrowings
Fair Value Financial Assets And Liabilities Carrying Amount	198,574	217,397
Fair Value Financial Assets And Liabilities	198,574	217,397
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities structured repurchase agreements
Fair Value Financial Assets And Liabilities Carrying Amount	53,052	53,090
Fair Value Financial Assets And Liabilities	59,563	60,471
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities subordinated debentures
Fair Value Financial Assets And Liabilities Carrying Amount	30,929	30,929
Fair Value Financial Assets And Liabilities	30,929	30,929
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Financial liabilities accrued interest payable
Fair Value Financial Assets And Liabilities Carrying Amount	1,609	2,277
Fair Value Financial Assets And Liabilities	1,609	2,277
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Commitments to originate loans
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Letters of credit
Fair Value Financial Assets And Liabilities Carrying Amount	75	84
Fair Value Financial Assets And Liabilities	$ 75	$ 84
Fair Value Financial Assets And Liabilities Heirarchy Level	3
Lines of credit
Fair Value Financial Assets And Liabilities Heirarchy Level	3