Pension and Other Post-Retirement Benefit Plans (Fair Value Measurements Using Significant Level 3 Unobservable Inputs) (Details) (Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	$ 44,150	$ 40,316
Unrealized gains	6,264	6,236
Purchases & settlements	(1,514)	(2,402)
Plan assets, ending balance	48,900	44,150
Hedge Funds & Private Equity [Member]
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	26,969	25,759
Unrealized gains	3,884	3,612
Purchases & settlements	(1,514)	(2,402)
Plan assets, ending balance	29,339	26,969
Real Estate Investments [Member]
Schedule of Level Three Defined Benefit Plan Assets [Roll Forward]
Plan assets, beginning balance	17,181	14,557
Unrealized gains	2,380	2,624
Purchases & settlements	0	0
Plan assets, ending balance	$ 19,561	$ 17,181