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Allowance for Loan Losses:	3 Months Ended
Mar. 31, 2012
Allowance for Loan Losses: [Abstract]
Allowance for Loan Losses:	Allowance for Loan Losses: The Company changed its methodology for estimating the valuation allowance for probable incurred loan losses for the three month period ended March 31, 2012. During the most recent period end, management computed the historical loss percentage based upon the loss history of the past 12 quarters. In previous periods, management used a historical loss percentage based on the past 8 quarters. Using a 12 quarter loss history resulted in a larger historical loss ratio than what would have been computed using an 8 quarter history. The primary factor for the change was the lower historical loss percentage applied to homogeneous and pass rated loans due to recent lower levels of net charge-offs. This new 12 quarter history methodology did not result in a provision for loan losses for the three month period ended March 31, 2012.

Allowance for Loan Losses:

3 Months Ended

Mar. 31, 2012

Allowance for Loan Losses: [Abstract]

Allowance for Loan Losses:

The Company changed its methodology for estimating the valuation allowance for probable incurred loan losses for the three month period ended March 31, 2012. During the most recent period end, management computed the historical loss percentage based upon the loss history of the past 12 quarters. In previous periods, management used a historical loss percentage based on the past 8 quarters. Using a 12 quarter loss history resulted in a larger historical loss ratio than what would have been computed using an 8 quarter history. The primary factor for the change was the lower historical loss percentage applied to homogeneous and pass rated loans due to recent lower levels of net charge-offs. This new 12 quarter history methodology did not result in a provision for loan losses for the three month period ended March 31, 2012.