Loans Receivable, Net (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Loan portfolio aging analysis
Accruing loans 30-59 days past due	$ 18,772	$ 17,454
Accruing loans 60-89 days past due	3,290	9,643
Accruing loans 90 days or more past due	456	1,479
Non-accrual loans	89,355	96,933
Total past due and non-accrual loans	111,873	125,509
Current loans receivable	3,561,583	3,271,916
Total loans receivable	3,673,456	3,397,425
Residential Real Estate [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days past due	1,318	3,897
Accruing loans 60-89 days past due	965	1,870
Accruing loans 90 days or more past due	240	451
Non-accrual loans	12,149	14,237
Total past due and non-accrual loans	14,672	20,455
Current loans receivable	517,162	496,012
Total loans receivable	531,834	516,467
Commercial Real Estate [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days past due	8,904	7,424
Accruing loans 60-89 days past due	1,382	3,745
Accruing loans 90 days or more past due	0	594
Non-accrual loans	53,400	55,687
Total past due and non-accrual loans	63,686	67,450
Current loans receivable	1,757,914	1,588,058
Total loans receivable	1,821,600	1,655,508
Other Commercial [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days past due	4,007	2,020
Accruing loans 60-89 days past due	297	645
Accruing loans 90 days or more past due	22	197
Non-accrual loans	12,568	13,200
Total past due and non-accrual loans	16,894	16,062
Current loans receivable	706,293	607,335
Total loans receivable	723,187	623,397
Home Equity [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days past due	3,774	2,872
Accruing loans 60-89 days past due	385	2,980
Accruing loans 90 days or more past due	146	188
Non-accrual loans	9,303	11,241
Total past due and non-accrual loans	13,608	17,281
Current loans receivable	371,080	386,644
Total loans receivable	384,688	403,925
Other Consumer [Member]
Loan portfolio aging analysis
Accruing loans 30-59 days past due	769	1,241
Accruing loans 60-89 days past due	261	403
Accruing loans 90 days or more past due	48	49
Non-accrual loans	1,935	2,568
Total past due and non-accrual loans	3,013	4,261
Current loans receivable	209,134	193,867
Total loans receivable	$ 212,147	$ 198,128