Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance For Doubtful Accounts Receivable Rollforward [Line Items]
Allowance for Doubtful Accounts, Balance at Beginning of Period	$ 664	$ 395	$ 578
Charged to Costs and Expenses	206	339	139
Allowance From Acquisitions	0	99	0
Write Off of Uncollectible Accounts, Net of Recoveries	(310)	(169)	(322)
Allowance for Doubtful Accounts, Balance at End of Period	$ 560	$ 664	$ 395