Other Intangible Asset (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Other intangible assets
Indefinite-lived intangibles, net carrying amount		$ 60,000
Amortizable intangibles, gross carrying amount	131,575	117,785
Amortizable intangibles, accumulated amortization	60,166	54,363
Amortizable intangibles, net carrying amount	71,409	63,422
Intangible Assets, Gross (Excluding Goodwill), Total	195,175	177,785
Net Carrying Amount	135,009	123,422
Estimated amortization expense for the next five years
2013	7,361
2014	6,903
2015	6,903
2016	6,903
2017	6,381
Other intangible assets, additional disclosure
Finite-Lived Intangible Assets, Remaining Amortization Period	11 years 6 months
Distribution network
Other intangible assets
Amortizable intangibles, gross carrying amount	80,000	80,000
Amortizable intangibles, accumulated amortization	43,000	39,000
Amortizable intangibles, net carrying amount	37,000	41,000
Customer relations
Other intangible assets
Amortizable intangibles, gross carrying amount	19,120	10,820
Amortizable intangibles, accumulated amortization	1,990	1,404
Amortizable intangibles, net carrying amount	17,130	9,416
Patents
Other intangible assets
Amortizable intangibles, gross carrying amount	19,636	16,436
Amortizable intangibles, accumulated amortization	7,121	6,293
Amortizable intangibles, net carrying amount	12,515	10,143
Noncompete agreements
Other intangible assets
Amortizable intangibles, gross carrying amount	7,140	5,050
Amortizable intangibles, accumulated amortization	5,050	5,050
Amortizable intangibles, net carrying amount	2,090
Trademark
Other intangible assets
Amortizable intangibles, gross carrying amount	5,459	5,459
Amortizable intangibles, accumulated amortization	2,985	2,596
Amortizable intangibles, net carrying amount	2,474	2,863
Backlog
Other intangible assets
Amortizable intangibles, gross carrying amount	200
Amortizable intangibles, net carrying amount	200
License
Other intangible assets
Amortizable intangibles, gross carrying amount	20	20
Amortizable intangibles, accumulated amortization	20	20
Trademark and tradenames
Other intangible assets
Indefinite-lived intangibles, net carrying amount	$ 63,600