Commitments Guarantees and Contingencies (Details Textual) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Credit of Unfunded Commitments	$ 61,600,000				$ 61,600,000					$ 18,400,000
Loans serviced for others	11,383,051,000				11,383,051,000					12,611,723,000
Representations and Warranties Reserve for Loan Receivables [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	(10,680,000,000)				(10,680,000,000)					(11,890,000,000)
Loss Contingency Accrual, at Carrying Value	1,667,000		1,598,000		1,667,000		1,598,000		1,235,000	1,260,000	1,810,000	1,955,000
Loss Contingency Accrual, Carrying Value, Provision	518,000	[1]	505,000	[1]	1,070,000	[1]	1,513,000	[1]
Loss Contingency Accrual, Carrying Value, Payments	86,000	[2]	717,000	[2]	663,000	[2]	1,870,000	[2]
Legal Reserve [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value	0				0
Home Equity and Business Banking Credit Lines [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	151,900,000				151,900,000					(154,000,000)
Undisbursed construction loan funds [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	327,500,000				327,500,000					(168,500,000)
Credit Risk [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value	264,000		200,000		264,000		200,000			181,000
Multifamily Residential [Member] | Loss Sharing Relationship [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value	1,800,000				1,800,000					2,000,000
Loss Contingency, Loss in Period			0		0
Loans serviced for others	$ 703,200,000				$ 703,200,000					$ 720,400,000
Minimum [Member]
Loss Contingencies [Line Items]
Percentage of Loss that Lender is Responsible For on Loans Sold under Loss Sharing Agreement					5.00%
Maximum [Member]
Loss Contingencies [Line Items]
Percentage of Loss that Lender is Responsible For on Loans Sold under Loss Sharing Agreement					20.00%

[1] Includes additions for new loan sales and changes in estimated probable future repurchase losses on previously sold loans.

[2] Includes principal losses and accrued interest on repurchased loans, “make-whole” settlements, settlements with claimants and certain related expense.