Employee Retirement Savings Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Retirement Savings Plan [Abstract]
Employees maximum contribution percentage of annual compensation	50.00%
Employer matching contribution, percent	25.00%
Maximum annual contribution per employee, matched by employer, percent	10.00%
Expense recorded	$ 484,000	$ 408,000	$ 243,000