Goodwill and Intangible Assets - Changes in Goodwill Balance (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2016
USD ($)
segment
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill, Beginning Balance $ 10,358
Acquisitions 822
Goodwill, Ending Balance $ 11,180
Number of Reporting Units | segment 2