Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Other Intangible Assets
Gross Carrying Amount	$ 121,302		$ 121,302	$ 112,620
Accumulated Amortization	(52,650)		(52,650)	(48,250)
Total amortization expense	68,652		68,652	64,370
Amortization expense	1,711	$ 1,638	4,860	4,254
Customer lists/relationships
Other Intangible Assets
Gross Carrying Amount	64,323		64,323	63,386
Accumulated Amortization	(32,833)		(32,833)	(30,318)
Total amortization expense	31,490		31,490	33,068
Patents
Other Intangible Assets
Gross Carrying Amount	10,319		10,319	10,319
Accumulated Amortization	(10,319)		(10,319)	(10,319)
Total amortization expense	0		0	0
Technology and other intangibles
Other Intangible Assets
Gross Carrying Amount	44,460		44,460	36,715
Accumulated Amortization	(9,498)		(9,498)	(7,613)
Total amortization expense	34,962		34,962	29,102
In process research and development
Other Intangible Assets
Gross Carrying Amount				2,200
Total amortization expense	2,200		2,200	$ 2,200
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 2,200		$ 2,200