Contingencies (Schedule of Changes in Claims) (Details) - Asbestos Litigation [Member] $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) claims	Dec. 31, 2015 USD ($) claims	Dec. 31, 2014 USD ($) claims	Dec. 31, 2013 USD ($) claims	Dec. 31, 2012 USD ($) claims	Dec. 31, 2011 USD ($) claims	Dec. 31, 2010 USD ($) claims	Dec. 31, 2009 USD ($) claims	Dec. 31, 2008 USD ($) claims	Dec. 31, 2007 USD ($) claims	Dec. 31, 2006 USD ($) claims	Dec. 31, 2005 USD ($) claims
Loss Contingencies [Line Items]
Opening Number of Claims	3,791	3,821	4,299	4,463	4,446	5,170	8,945	18,385	18,798	19,416	24,451	29,411
Claims Dismissed, Settled, or Resolved	127	116	625	230	90	789	3,963	9,482	523	808	6,841	6,257
New Claims	89	86	147	66	107	65	188	42	110	190	1,806	1,297
Closing Number of Claims	3,753	3,791	3,821	4,299	4,463	4,446	5,170	8,945	18,385	18,798	19,416	24,451
Amounts Paid (thousands) to Settle or Resolve ($) | $	$ 733	$ 164	$ 437	$ 78	$ 530	$ 1,111	$ 159	$ 88	$ 52	$ 15	$ 3,879	$ 504
Brandon Drying Fabrics, Inc. [Member]
Loss Contingencies [Line Items]
Opening Number of Claims	7,713	7,730	7,815	7,867	7,877	7,869	7,907	8,664	8,740	9,114	9,566	9,985
Claims Dismissed, Settled, or Resolved	6	18	87	55	12	3	47	760	86	462	1,182	642
New Claims		1	2	3	2	11	9	3	10	88	730	223
Closing Number of Claims	7,707	7,713	7,730	7,815	7,867	7,877	7,869	7,907	8,664	8,740	9,114	9,566
Amounts Paid (thousands) to Settle or Resolve ($) | $