Loans Receivable, Net (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Loan	Jun. 30, 2012 Loan	Jun. 30, 2013 Loan	Jun. 30, 2012 Loan
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	18	47	42	103
Troubled debt restructurings, Pre-modification recorded balance	$ 2,645	$ 11,929	$ 9,160	$ 28,455
Troubled debt restructurings, Post-modification recorded balance	2,693	10,650	9,378	26,469
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	5	9	10	20
Financing Receivable Modifications Subsequent Defaults Recorded Investment	1,982	3,127	3,145	6,207
Residential Real Estate [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	0	5	7	8
Troubled debt restructurings, Pre-modification recorded balance	0	1,342	1,623	1,701
Troubled debt restructurings, Post-modification recorded balance	0	1,342	1,794	1,701
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	0	1	0
Financing Receivable Modifications Subsequent Defaults Recorded Investment	265	0	265	0
Commercial Real Estate [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	4	15	13	40
Troubled debt restructurings, Pre-modification recorded balance	1,340	5,736	4,656	16,846
Troubled debt restructurings, Post-modification recorded balance	1,340	4,444	4,656	14,838
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	4	5	11
Financing Receivable Modifications Subsequent Defaults Recorded Investment	1,555	2,077	2,607	4,735
Other Commercial [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	10	22	17	41
Troubled debt restructurings, Pre-modification recorded balance	1,067	4,309	2,572	8,432
Troubled debt restructurings, Post-modification recorded balance	1,084	4,322	2,588	8,454
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	2	3	5
Financing Receivable Modifications Subsequent Defaults Recorded Investment	162	531	228	798
Home Equity [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	2	1	2	7
Troubled debt restructurings, Pre-modification recorded balance	160	310	160	1,095
Troubled debt restructurings, Post-modification recorded balance	191	310	191	1,095
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	1	0	2
Financing Receivable Modifications Subsequent Defaults Recorded Investment	0	442	0	597
Other Consumer [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, Number of Loans	2	4	3	7
Troubled debt restructurings, Pre-modification recorded balance	78	232	149	381
Troubled debt restructurings, Post-modification recorded balance	78	232	149	381
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	2	1	2
Financing Receivable Modifications Subsequent Defaults Recorded Investment	$ 0	$ 77	$ 45	$ 77