Pension Benefit Plans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
HNH | Pension Plans, Defined Benefit
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
2015			$ 10,300
2016			14,300
2017			15,300
2018			17,000
2019			18,300
After year five			56,400
HNH | Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Aggregate expense	$ 400	$ 500	900	$ 900
API Group plc (API) | Pension Plans, Defined Benefit
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Until 2021			$ 1,102