Pension Benefit Plans Components of Pension Expense and Other Postretirement Benefit Expense(Details) - HNH - Pension Plans, Defined Benefit - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plans Disclosure [Line Items]
Interest cost	$ 5,664	$ 5,248	$ 10,424	$ 10,496
Expected return on plan assets	(6,513)	(6,050)	(12,030)	(12,100)
Administrative costs / investment management fees	189	0	189	0
Amortization of actuarial loss	1,595	577	3,190	1,154
Total	$ 935	$ (225)	$ 1,773	$ (450)