Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended			3 Months Ended				6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jul. 28, 2010 Interest Rate Swaps [Member] Total Return Swap [Member]	Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2013 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2013 Derivatives Designated As Hedging Instruments [Member]	Dec. 31, 2013 Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member] Cash Flow Hedging [Member]		Jun. 30, 2013 Derivatives Designated As Hedging Instruments [Member] Cash Flow Hedging [Member]		Jun. 30, 2014 Derivatives Designated As Hedging Instruments [Member] Cash Flow Hedging [Member]		Jun. 30, 2013 Derivatives Designated As Hedging Instruments [Member] Cash Flow Hedging [Member]		Jun. 30, 2014 Other Liabilities [Member]	Dec. 31, 2013 Other Liabilities [Member]	Jun. 30, 2014 Other Liabilities [Member] Derivatives Designated As Hedging Instruments [Member]	Dec. 31, 2013 Other Liabilities [Member] Derivatives Designated As Hedging Instruments [Member]	Jun. 30, 2014 Other Liabilities [Member] Derivative Liabilities Included Other liabilities [Member]	Dec. 31, 2013 Other Liabilities [Member] Derivative Liabilities Included Other liabilities [Member]
Derivative [Line Items]
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value		$ 0		$ 0
Losses on derivative instruments from counterparty nonperformance	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		577,000	777,000	928,000	2,382,000			577,000	777,000	928,000	2,382,000		577,000	[1]	777,000	[1]	928,000	[1]	2,382,000	[1]
Derivative Liability, Fair Value, Gross Liability																					56,574,000	68,397,000	63,000	583,000	56,574,000	68,397,000
Fair values of derivative assets reduced (increased) by net credit valuation adjustments		1,900,000	2,800,000	1,900,000	2,800,000
Fair values of derivative liabilities reduced (increased) by net credit valuation adjustments		500,000	2,200,000	500,000	2,200,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Future Expected				2,700,000
Total derivatives, Notional amount		3,394,831,000		3,394,831,000		4,979,378,000	1,160,000,000	200,000,000		200,000,000		100,000,000
Cash collateral pledged for derivative liabilities		44,300,000		44,300,000
Additional collateral that would be required to be pledge if credit rating was downgraded by one notch		1,600,000		1,600,000
Par Amount of Portfolio Covered by TRS		545,000,000		545,000,000
Reduction of Risk-weighted Assets from TRS		$ 1,000,000,000		$ 1,000,000,000

[1] Amounts recognized in OCI and reclassified from accumulated OCI (“AOCI”) represent the effective portion of the derivative gain (loss).