Other Intangible Assets - Schedule of other intangible assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	$ 51,670	$ 51,527
Finite-lived intangible assets, accumulated amortization	15,681	14,926
Total other intangible assets	63,300	63,157
Other intangible assets, net	47,619	48,231
Trademarks and brand names
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, cost	11,630	11,630
Acquired Intangible Assets
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	49,879	49,736
Finite-lived intangible assets, accumulated amortization	15,488	14,830
Patents and technology
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	17,457	17,310
Finite-lived intangible assets, accumulated amortization	5,850	5,586
Customer lists
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	30,877	30,877
Finite-lived intangible assets, accumulated amortization	8,509	8,127
Trademarks and brand names
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	1,545	1,549
Finite-lived intangible assets, accumulated amortization	1,129	1,117
Deferred financing costs
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, cost	1,791	1,791
Finite-lived intangible assets, accumulated amortization	$ 193	$ 96