Loans Receivable, Net (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012 Loan	Sep. 30, 2012 Loan
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	46	149
Troubled debt restructurings, pre-modification recorded balance	$ 38,125	$ 66,580
Troubled debt restructurings, post-modification recorded balance	35,475	61,944
Troubled debt restructurings that subsequently defaulted, number of loans	3	17
Troubled debt restructurings that subsequently defaulted, recorded balance	1,792	10,204
Residential Real Estate [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	1	9
Troubled debt restructurings, pre-modification recorded balance	280	1,981
Troubled debt restructurings, post-modification recorded balance	281	1,982
Troubled debt restructurings that subsequently defaulted, number of loans	2	2
Troubled debt restructurings that subsequently defaulted, recorded balance	1,622	1,622
Commercial Real Estate [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	21	61
Troubled debt restructurings, pre-modification recorded balance	20,866	37,712
Troubled debt restructurings, post-modification recorded balance	18,242	33,080
Troubled debt restructurings that subsequently defaulted, number of loans	0	10
Troubled debt restructurings that subsequently defaulted, recorded balance	0	7,553
Other Commercial [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	19	60
Troubled debt restructurings, pre-modification recorded balance	16,601	25,033
Troubled debt restructurings, post-modification recorded balance	16,571	25,025
Troubled debt restructurings that subsequently defaulted, number of loans	0	3
Troubled debt restructurings that subsequently defaulted, recorded balance	0	801
Home Equity [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	2	9
Troubled debt restructurings, pre-modification recorded balance	219	1,314
Troubled debt restructurings, post-modification recorded balance	222	1,317
Troubled debt restructurings that subsequently defaulted, number of loans	1	1
Troubled debt restructurings that subsequently defaulted, recorded balance	170	170
Other Consumer [Member]
Summary of troubled debt restructurings
Troubled debt restructurings, number of loans	3	10
Troubled debt restructurings, pre-modification recorded balance	159	540
Troubled debt restructurings, post-modification recorded balance	159	540
Troubled debt restructurings that subsequently defaulted, number of loans	0	1
Troubled debt restructurings that subsequently defaulted, recorded balance	$ 0	$ 58