Loans Receivable, Net (Details 2) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	$ 30,443	$ 36,545
Accruing loans 60-89 days or more past due	10,708	8,952
Accruing loans 90 days or more past due	7,177	4,531
Non-accual loans	154,784	192,505
Total past due and non-accrual loans	203,112	242,533
Current loans receivable	3,398,699	3,506,756
Total Loans Receivable	3,601,811	3,749,289
Residential Real Estate [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	703	13,450
Accruing loans 60-89 days or more past due	2,968	1,494
Accruing loans 90 days or more past due	1,026	506
Non-accual loans	14,444	23,095
Total past due and non-accrual loans	19,141	38,545
Current loans receivable	508,667	594,332
Commercial Real Estate [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	18,887	11,399
Accruing loans 60-89 days or more past due	4,427	4,424
Accruing loans 90 days or more past due	2,780	731
Non-accual loans	108,833	142,334
Total past due and non-accrual loans	134,927	158,888
Current loans receivable	1,598,445	1,637,615
Other Commercial [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	4,510	6,262
Accruing loans 60-89 days or more past due	1,294	1,053
Accruing loans 90 days or more past due	2,689	2,320
Non-accual loans	19,931	18,802
Total past due and non-accrual loans	28,424	28,437
Current loans receivable	628,593	626,151
Home Equity [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	4,520	3,031
Accruing loans 60-89 days or more past due	1,283	1,642
Accruing loans 90 days or more past due	437	910
Non-accual loans	8,477	5,431
Total past due and non-accrual loans	14,717	11,014
Current loans receivable	445,791	472,123
Other Consumer [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days or more past due	1,823	2,403
Accruing loans 60-89 days or more past due	736	339
Accruing loans 90 days or more past due	245	64
Non-accual loans	3,099	2,843
Total past due and non-accrual loans	5,903	5,649
Current loans receivable	$ 217,203	$ 176,535