Pension and Other Post-Retirement Benefits (Fair Value WHX/Bear Pension Plan Assets, Significant Unobservable Inputs) (Details) (Pension Benefits, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2012
Change in plan assets:
Fair value of plan assets at January 1			$ 328,726
Fair value of plan assets at December 31	351,869	323,493	328,726
U.S. mid-cap growth
Change in plan assets:
Fair value of plan assets at December 31	62,106	36,771
U.S. mid-cap growth | Level 3
Change in plan assets:
Fair value of plan assets at January 1	208
Transfers into Level 3	0
Transfers out of Level 3	0
Gains or losses included in changes in net assets	23
Purchases	0
Issuances	0
Sales	(231)
Settlements	0
Fair value of plan assets at December 31	0	0
Corporate bonds and loans
Change in plan assets:
Fair value of plan assets at December 31	63,561	50,895
Corporate bonds and loans | Level 3
Change in plan assets:
Fair value of plan assets at January 1	545	500
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Gains or losses included in changes in net assets	84	73
Purchases	0	0
Issuances	0	0
Sales	(129)	(573)
Settlements	0	0
Fair value of plan assets at December 31	$ 500	$ 0