Goodwill and Intangible Assets (Details Textuals) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) acquisition	Mar. 31, 2016 USD ($) acquisition	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Goodwill acquired during period	$ 55	$ 3,000
Additions to finite-lived intangible assets	$ 162	$ 1,000
Number of Acquisitions | acquisition	1	2
Goodwill	$ 972,006		$ 971,951