Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Finite-lived intangible assets, amortization expense, 2019	$ 3,796
Finite-lived intangible assets, amortization expense, 2020	3,262
Finite-lived intangible assets, amortization expense, 2021	2,713
Finite-lived intangible assets, amortization expense, 2022	2,350
Finite-lived intangible assets, amortization expense, 2023	2,034
Finite-lived intangible assets, amortization expense, thereafter	10,487
Finite-lived intangible assets, net	24,642	$ 29,463
Technology-based intangible assets [Member]
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Finite-lived intangible assets, amortization expense, 2019	1,140
Finite-lived intangible assets, amortization expense, 2020	1,112
Finite-lived intangible assets, amortization expense, 2021	1,061
Finite-lived intangible assets, amortization expense, 2022	1,002
Finite-lived intangible assets, amortization expense, 2023	836
Finite-lived intangible assets, amortization expense, thereafter	6,720
Finite-lived intangible assets, net	11,871	11,169
Customer-related intangible assets [Member]
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Finite-lived intangible assets, amortization expense, 2019	2,656
Finite-lived intangible assets, amortization expense, 2020	2,150
Finite-lived intangible assets, amortization expense, 2021	1,652
Finite-lived intangible assets, amortization expense, 2022	1,348
Finite-lived intangible assets, amortization expense, 2023	1,198
Finite-lived intangible assets, amortization expense, thereafter	3,767
Finite-lived intangible assets, net	$ 12,771	$ 18,224