Balance Sheet Components Other assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Origination of Notes Receivable	$ 3,000
Other Investments	18,000	0
Restricted Cash and Investments, Noncurrent	0	4,040
Deposit Assets	2,578	2,581
Spares	4,429	2,757
Other Assets	2,552	631
Other Assets, Noncurrent	$ 27,559	$ 10,009