5. Loans and Allowance For Loan Losses: Impaired Loans, additional information (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Impaired Financing Receivable, Average Recorded Investment	$ 2,121	$ 1,667
Impaired Financing Receivable, Interest Income, Accrual Method	6
Commercial And Industrial
Impaired Financing Receivable, Average Recorded Investment	908	582
Impaired Financing Receivable, Interest Income, Accrual Method	2
Commercial And Industrial | Commercial
Impaired Financing Receivable, Average Recorded Investment	749	481
Impaired Financing Receivable, Interest Income, Accrual Method	1
Commercial And Industrial | SBA Loans
Impaired Financing Receivable, Average Recorded Investment	49
Impaired Financing Receivable, Interest Income, Accrual Method	1
Commercial And Industrial | Asset Based Loans
Impaired Financing Receivable, Average Recorded Investment	110	101
Commercial Real Estate
Impaired Financing Receivable, Average Recorded Investment	1,213	1,085
Impaired Financing Receivable, Interest Income, Accrual Method	4
Commercial Real Estate | Commercial Mortgages
Impaired Financing Receivable, Average Recorded Investment	642	675
Impaired Financing Receivable, Interest Income, Accrual Method	4
Commercial Real Estate | Religious Organizations
Impaired Financing Receivable, Average Recorded Investment	$ 571	$ 410