Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Amortized intangible assets
Original Cost	$ 168,923	$ 169,456
Accumulated Amortization	62,823	49,216
Net Book Value	106,100	120,240
Customer list
Amortized intangible assets
Original Cost	41,477	42,561
Accumulated Amortization	14,958	12,130
Net Book Value	26,519	30,431
Non-compete agreement
Amortized intangible assets
Original Cost	4,594	4,594
Accumulated Amortization	3,064	2,517
Net Book Value	1,530	2,077
Supply agreement
Amortized intangible assets
Original Cost	9,806	9,806
Accumulated Amortization	4,827	3,955
Net Book Value	4,979	5,851
Technology
Amortized intangible assets
Original Cost	15,500	15,500
Accumulated Amortization	4,243	2,483
Net Book Value	11,257	13,017
Trademarks and patents
Amortized intangible assets
Original Cost	18,717	18,717
Accumulated Amortization	4,335	2,273
Net Book Value	14,382	16,444
Lease intangible
Amortized intangible assets
Original Cost	5,514	5,479
Accumulated Amortization	4,969	4,586
Net Book Value	545	893
Software
Amortized intangible assets
Original Cost	71,362	70,846
Accumulated Amortization	24,592	19,508
Net Book Value	46,770	51,338
Other
Amortized intangible assets
Original Cost	1,953	1,953
Accumulated Amortization	1,835	1,764
Net Book Value	$ 118	$ 189