Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 7,912
Operating Leases, Future Minimum Payments, Due in Two Years	6,040
Operating Leases, Future Minimum Payments, Due in Three Years	3,274
Operating Leases, Future Minimum Payments, Due in Four Years	1,180
Operating Leases, Future Minimum Payments, Due in Five Years	180
Operating Leases, Future Minimum Payments, Due Thereafter	479
Operating Leases, Future Minimum Payments Due	19,065
Operating Leases, Rent Expense	$ 9,200	$ 8,800	$ 6,400