Loans Receivable and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Recorded Investment	$ 0	$ 973	$ 172	$ 4,176
Number of loans and leases modified in troubled debt restructurings	0	12	3	18
TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Recorded Investment	812	1,423	1,204	5,526
Number of loans and leases modified in troubled debt restructurings	7	4	14	19
Commercial and industrial [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	1
Recorded Investment	0	0	0	108
Commercial and industrial [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
Commercial real estate [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	3
Recorded Investment	0	0	0	2,543
Commercial real estate [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	4	0	18
Recorded Investment	0	1,423	0	4,904
Construction [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	1
Recorded Investment	0	0	0	550
Construction [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
Manufactured housing [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	12	3	12
Recorded Investment	0	973	172	973
Manufactured housing [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	2	0	8	0
Recorded Investment	173	0	447	0
Residential real estate [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	0
Recorded Investment	0	0	0	0
Residential real estate [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	3	0	4	1
Recorded Investment	188	0	306	622
Consumer [Member] | TDRs in compliance with their modified terms and accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	0	0	0	1
Recorded Investment	0	0	0	2
Consumer [Member] | TDRs that are not accruing interest [Member]
Summary of loans and leases modified in troubled debt restructurings and the recorded investments and unpaid principal balances
Number of Loans	2	0	2	0
Recorded Investment	$ 451	$ 0	$ 451	$ 0