Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2018	$ 4,960
Finite-lived intangible assets, amortization expense, 2019	3,994
Finite-lived intangible assets, amortization expense, 2020	3,405
Finite-lived intangible assets, amortization expense, 2021	2,803
Finite-lived intangible assets, amortization expense, 2022	2,396
Finite-lived intangible assets, amortization expense, thereafter	11,905
Finite-lived intangible assets, net	29,463	$ 5,591
Technology-based intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2018	1,013
Finite-lived intangible assets, amortization expense, 2019	1,019
Finite-lived intangible assets, amortization expense, 2020	991
Finite-lived intangible assets, amortization expense, 2021	940
Finite-lived intangible assets, amortization expense, 2022	878
Finite-lived intangible assets, amortization expense, thereafter	6,328
Finite-lived intangible assets, net	11,169	1,893
Customer-related intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2018	3,877
Finite-lived intangible assets, amortization expense, 2019	2,975
Finite-lived intangible assets, amortization expense, 2020	2,414
Finite-lived intangible assets, amortization expense, 2021	1,863
Finite-lived intangible assets, amortization expense, 2022	1,518
Finite-lived intangible assets, amortization expense, thereafter	5,577
Finite-lived intangible assets, net	18,224	3,196
Employment related intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense, 2018	70
Finite-lived intangible assets, amortization expense, 2019	0
Finite-lived intangible assets, amortization expense, 2020	0
Finite-lived intangible assets, amortization expense, 2021	0
Finite-lived intangible assets, amortization expense, 2022	0
Finite-lived intangible assets, amortization expense, thereafter	0
Finite-lived intangible assets, net	$ 70	$ 502