Commitments Guarantees and Contingencies (Details Textual) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Credit of Unfunded Commitments	$ 38,000,000				$ 38,000,000					$ 18,400,000
Loans serviced for others	10,698,067,000				10,698,067,000					12,611,723,000
Representations and Warranties Reserve for Loan Receivables [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	9,990,000,000				9,990,000,000					11,890,000,000
Loss Contingency Accrual, at Carrying Value	1,235,000		1,810,000		1,235,000		1,810,000		1,142,000	1,260,000	1,975,000	1,955,000
Loss Contingency Accrual, Carrying Value, Provision	313,000	[1]	472,000	[1]	552,000	[1]	1,008,000	[1]
Loss Contingency Accrual, Carrying Value, Payments	220,000	[2]	637,000	[2]	577,000	[2]	1,153,000	[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	146,700,000				146,700,000					154,000,000
Undisbursed construction loan funds [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	292,800,000				292,800,000					168,500,000
Credit Risk [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value	242,000		203,000		242,000		203,000			181,000
Multifamily Residential [Member] | Loss Sharing Relationship [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value	2,000,000				2,000,000					2,000,000
Loss Contingency, Loss in Period			0		0
Loans serviced for others	$ 705,000,000				$ 705,000,000					$ 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.