Basis of Presentation and Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of year	$ 2,433	$ 1,328	$ 755
Provision for credit losses, net of recoveries	4,331	1,740	922
Accounts written off	(2,439)	(635)	(349)
Balance, end of year	$ 4,325	$ 2,433	$ 1,328