Loans Receivable (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Residential Real Estate, Single Family [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	$ 331,097	$ 326,005
Consumer Home Equity [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	80,409	80,418
Dealer Auto and RV [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	46,861	46,571
Other Consumer [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	7,420	7,896
Performing [Member] | Residential Real Estate, Single Family [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	327,410	322,662
Performing [Member] | Consumer Home Equity [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	80,092	80,124
Performing [Member] | Dealer Auto and RV [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	46,691	46,450
Performing [Member] | Other Consumer [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	7,299	7,787
Nonperforming [Member] | Residential Real Estate, Single Family [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	3,687	3,343
Nonperforming [Member] | Consumer Home Equity [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	317	294
Nonperforming [Member] | Dealer Auto and RV [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	170	121
Nonperforming [Member] | Other Consumer [Member]
Performing and nonperforming single family residential and consumer loans based on payment activity
Financing Receivable	$ 121	$ 109