Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		$ 3,000
Tax Credit Carryforward, Amount		$ 2,100	$ 300	$ 600
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%	35.00%	35.00%
Income Taxes Receivable		$ 56,600	$ 56,700
Interest recognized on income tax refunds		2,800	1,000
Increase (Decrease) in Deferred Income Taxes		27,700
Deferred tax (benefit) expense		(15,513)	(5,154)	$ 11,499
Valuation allowance increase (decrease)		(5,800)
Deferred Tax Assets, Valuation Allowance		74,918	80,722
Net operating loss and credit carry forwards		62,403	64,561
Unrecognized deferred tax liability for thrift bad-debt reserves		21,400
Bad Debt Reserve for Tax Purposes of Qualified Lender		58,000	58,000
Unrecognized tax benefits that would impact effective tax rate		3,300	3,000	2,000
Interest and penalties		1,100	500	$ 300
Accrued interest and penalties related to UTBs		2,500	$ 1,600
Shareholders' Equity [Member]
Operating Loss Carryforwards [Line Items]
Increase (Decrease) in Deferred Income Taxes		14,300
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)		1,000
Deferred Tax Assets, Valuation Allowance		69,600
Capital Loss Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)		(1,000)
Deferred Tax Assets, Valuation Allowance		5,300
Future years [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)		4,400
Connecticut [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance		58,000
Net operating loss and credit carry forwards		1,200,000
Tax credit carryforwards		2,200
Minimum [Member] | Forecast [Member]
Operating Loss Carryforwards [Line Items]
Decrease in UTBs	$ 2,200
Maximum [Member] | Forecast [Member]
Operating Loss Carryforwards [Line Items]
Decrease in UTBs	$ 3,400
Available-for-sale Securities [Member]
Operating Loss Carryforwards [Line Items]
Increase (Decrease) in Deferred Income Taxes		13,300
Latest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		$ 15,400