Pension and Other Postretirement Benefits (Summary of Components of Accumulated Other Comprehensive Loss on A Pre-Tax Basis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Deferred tax benefit	$ (10,812)	$ (101)	$ 12,734
Webster Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	41,267	70,860
Prior service cost	0	0
Total pre-tax amounts included in accumulated other comprehensive loss	41,267	70,860
Deferred tax benefit	14,779	25,377
Amounts included in accumulated other comprehensive loss, net of tax	26,488	45,483
Webster SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	1,419	1,705
Prior service cost	0	0
Total pre-tax amounts included in accumulated other comprehensive loss	1,419	1,705
Deferred tax benefit	508	611
Amounts included in accumulated other comprehensive loss, net of tax	911	1,094
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	351	591
Prior service cost	159	232
Total pre-tax amounts included in accumulated other comprehensive loss	510	823
Deferred tax benefit	183	295
Amounts included in accumulated other comprehensive loss, net of tax	$ 327	$ 528