Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful account, beginning of year	$ 1,224	$ 1,729	$ 2,574
Increase in allowance charged to expense	630	(68)	47
Account charges against the expense	(605)	(437)	(892)
Allowance for doubtful account, end of year	$ 1,249	$ 1,224	$ 1,729