Detail of Selected Balance Sheet Accounts (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite lived intangible assets
Less accumulated amortization:	$ 11,238	$ 9,492
Intangible assets:
Gross	24,616	15,476
Total	13,378	5,984
Customer Relationships [Member]
Finite lived intangible assets
Finite lived intangible assets, gross	18,620	11,630
Less accumulated amortization:	11,238	9,492
Tradenames [Member]
Indefinite lived intangible assets:
Gross	$ 5,996	$ 3,846