(Schedule of Restricted Cash and Time Deposits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restricted Cash and Cash Equivalents Items [Line Items]
Time deposits	$ 30,181	$ 0
Interest rate on time deposit (as a percent)	0.74%
Long-term deposits	$ 238	156
Total	$ 30,419	156
Maturity date of time deposit	3/11/2016
Purchase Contracts
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term security deposits	$ 238	156
Provision for Loss on Contracts	0	0
Lease Agreements
Restricted Cash and Cash Equivalents Items [Line Items]
Provision for Loss on Contracts	$ 0	$ 0