Deferred Revenue (Details)			12 Months Ended
Dec. 31, 2012 Nonsoftware License Arrangement [Member] USD ($)	Dec. 31, 2011 Nonsoftware License Arrangement [Member] USD ($)	Dec. 31, 2012 AUSTRALIA USD ($)	Dec. 31, 2011 AUSTRALIA USD ($)	Dec. 31, 2010 AUSTRALIA USD ($)	Dec. 31, 2012 AUSTRALIA AUD
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 15,612,000	$ 24,366,000	$ 15,557,000	$ 15,261,000		15,000,000
Foreign currency effect on deferred revenue			$ (296,000)	$ (17,000)	$ (1,848,000)

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)

-URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

Name:	us-gaap_DeferredRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant