Post-retirement Plan (Net Periodic Pension Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Loss on settlement	$ 0	$ 0	$ 0	$ (28,986)
Other Post-Retirement Healthcare and Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefit earned during the period	224	278	672	834
Interest cost on projected benefit obligations	159	159	478	477
Amortization of prior service cost	(1,074)	(1,474)	(3,222)	(4,422)
Amortization of net loss	0	31	0	93
Loss on settlement	0	0	0	1,726
Net periodic post-retirement expense (credit)	$ (691)	$ (1,006)	$ (2,072)	$ (1,292)