Loans Receivable and Allowance for Loan Losses (Details 8) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loan payment delinquencies
30-59 days delinquent	$ 56,639	$ 61,145
60-89 days delinquent	17,200	27,948
90 days or greater delinquent	57,757	68,347	95,836
Total delinquency	131,596	157,440
Current	5,674,695	5,545,040
Total loans	5,806,291	5,702,480
Personal Banking
Loan payment delinquencies
30-59 days delinquent	38,947	44,911
60-89 days delinquent	11,677	13,194
90 days or greater delinquent	35,026	34,701	40,448
Total delinquency	85,650	92,806
Current	3,709,641	3,634,847
Total loans	3,795,291	3,727,653
Personal Banking | Residential mortgage loans
Loan payment delinquencies
30-59 days delinquent	27,486	32,921
60-89 days delinquent	7,568	9,387
90 days or greater delinquent	24,625	24,286	28,221
Total delinquency	59,679	66,594
Current	2,423,325	2,349,055
Total loans	2,483,004	2,415,649
Personal Banking | Home equity loans
Loan payment delinquencies
30-59 days delinquent	6,946	6,534
60-89 days delinquent	2,243	1,977
90 days or greater delinquent	8,344	8,479	9,560
Total delinquency	17,533	16,990
Current	1,066,406	1,066,664
Total loans	1,083,939	1,083,654
Personal Banking | Other consumer loans
Loan payment delinquencies
30-59 days delinquent	4,515	5,456
60-89 days delinquent	1,866	1,830
90 days or greater delinquent	2,057	1,936	2,667
Total delinquency	8,438	9,222
Current	219,910	219,128
Total loans	228,348	228,350
Business Banking
Loan payment delinquencies
30-59 days delinquent	17,692	16,234
60-89 days delinquent	5,523	14,754
90 days or greater delinquent	22,731	33,646	55,388
Total delinquency	45,946	64,634
Current	1,965,054	1,910,193
Total loans	2,011,000	1,974,827
Business Banking | Commercial real estate loans
Loan payment delinquencies
30-59 days delinquent	8,449	13,001
60-89 days delinquent	3,968	4,596
90 days or greater delinquent	18,433	24,550	44,603
Total delinquency	30,850	42,147
Current	1,577,549	1,543,686
Total loans	1,608,399	1,585,833
Business Banking | Commercial loans
Loan payment delinquencies
30-59 days delinquent	9,243	3,233
60-89 days delinquent	1,555	10,158
90 days or greater delinquent	4,298	9,096	10,785
Total delinquency	15,096	22,487
Current	387,505	366,507
Total loans	$ 402,601	$ 388,994