Loans Receivable Aging Analysis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Loan portfolio aging analysis
Accruing loans 30-59 days past due	$ 25,761	$ 17,454
Accruing loans 60-89 days past due	6,355	9,643
Accruing loans 90 days or more past due	604	1,479
Non-accrual loans	81,956	96,933
Total past due and non-accrual loans	114,676	125,509
Current loans receivable	3,948,162	3,271,916
Total loans receivable	4,062,838	3,397,425
Residential Real Estate
Loan portfolio aging analysis
Accruing loans 30-59 days past due	10,367	3,897
Accruing loans 60-89 days past due	1,055	1,870
Accruing loans 90 days or more past due	429	451
Non-accrual loans	10,702	14,237
Total past due and non-accrual loans	22,553	20,455
Current loans receivable	555,036	496,012
Total loans receivable	577,589	516,467
Commercial Real Estate
Loan portfolio aging analysis
Accruing loans 30-59 days past due	7,016	7,424
Accruing loans 60-89 days past due	2,709	3,745
Accruing loans 90 days or more past due	0	594
Non-accrual loans	51,438	55,687
Total past due and non-accrual loans	61,163	67,450
Current loans receivable	1,988,084	1,588,058
Total loans receivable	2,049,247	1,655,508
Other Commercial
Loan portfolio aging analysis
Accruing loans 30-59 days past due	3,673	2,020
Accruing loans 60-89 days past due	1,421	645
Accruing loans 90 days or more past due	160	197
Non-accrual loans	10,139	13,200
Total past due and non-accrual loans	15,393	16,062
Current loans receivable	836,643	607,335
Total loans receivable	852,036	623,397
Home Equity
Loan portfolio aging analysis
Accruing loans 30-59 days past due	2,432	2,872
Accruing loans 60-89 days past due	668	2,980
Accruing loans 90 days or more past due	5	188
Non-accrual loans	7,950	11,241
Total past due and non-accrual loans	11,055	17,281
Current loans receivable	355,410	386,644
Total loans receivable	366,465	403,925
Other Consumer
Loan portfolio aging analysis
Accruing loans 30-59 days past due	2,273	1,241
Accruing loans 60-89 days past due	502	403
Accruing loans 90 days or more past due	10	49
Non-accrual loans	1,727	2,568
Total past due and non-accrual loans	4,512	4,261
Current loans receivable	212,989	193,867
Total loans receivable	$ 217,501	$ 198,128